Mitoshi

"This is going to be one heck of a long shot. If it doesn't work out, well, … I love you both!!"

- Mitoshi to her brothers, A Blond Ray of Sunshine, Part 5: Frozen Summer

Summary
Mitoshi is one of the main protagonists of A Blond Ray of Sunshine — a Pokémon fan fiction series that takes place in a future timeline, almost one hundred years after the events of Pokémon Red and Blue. Making her debut in Family Reunion, she is portrayed as a excitable, sunny, caring 11-year-old girl from the suburban outskirts of Olivine City. Her only Pokémon, Bubbles the Lapras, is her best friend and confidant.

Raised as the only child of Antoshi and Latoshi's biological parents, she takes Bubbles and ventures out to find her long-lost brothers after learning of their existence. She initially appears as a mysterious, trench coat-clad stalker, whom Antoshi and Fireball confront in an alleyway. After escaping, she masquerades as a caretaker under the guise of 'Mimi', allowing Antoshi and Fireball to stay in her cabin in the woods outside of Route 35. Eventually, she reveals herself to be Antoshi's long-lost sister and becomes the missing piece of the puzzle connecting Antoshi and Latoshi as siblings. Like her brothers, she displays superhuman characteristics by way of her Ki; most notably, the ability to turn her body into water.

Family Reunion (2019)
After having witnessed Antoshi and Latoshi's second fight on the beach, Mitoshi — dressed in a large trench coat, sunglasses, and fedora to conceal her appearance — follows Antoshi and Fireball through Goldenrod City. Antoshi becomes aware of her presence, and lures her down an alleyway. He and Fireball confront her, demanding to know why she's following them. She runs away, down a dead-end, where she uses a running faucet to activate her water powers, allowing her liquefied body to escape down a storm drain.

Mitoshi places a sign for Antoshi and Fireball to see, leading them toward her cabin in the woods outside Route 35. Once there, she introduces herself as 'Mimi', giving the pair free food and a place to stay. Before long, Antoshi witnesses Mitoshi using her water powers in secret, realizing she was their stalker. He confronts her yet again, threatening to leave and never come back if she doesn't explain everything. In a moment of panic, she reveals that she is Antoshi's sister. Antoshi, overwhelmed by all of the exhausting occurrences since coming to Johto, runs off, unwilling to accept that he has yet another sibling whom he never knew of.

After talking to Fireball, Antoshi returns to the cabin, apologizing to the girl. He wishes to understand everything she knows, and Mitoshi gladly explains the story to him. Her parents were forced to give Antoshi and Latoshi up after realizing they could not afford to care for them once they were born. Some time passed, and Mitoshi was born over a year later, after the couple's financial burdens were lifted. One night, Mitoshi overheard them talking about their sons. She spoke to them about it, and they explained it all to her. From then on, Mitoshi became obsessed and elated by the thought of having two siblings. She eventually set out, with her parents' blessings, to find her brothers. Her search brought her to the fight along the beach, having sensed their Ki.

Antoshi is flabbergasted to learn that he was adopted. In the meantime, however, he comes to accept Mitoshi as his sister, and decides to stay with her and Bubbles for a while longer. Not long after, Latoshi comes around, looking to fight Antoshi once again. He discovers Mitoshi, believing her to be someone important to him. While Antoshi is away, Latoshi sneaks into the cabin and kidnaps the girl, leaving a note behind for Antoshi to follow him to Mt. Mortar. There, Antoshi tells Latoshi that Mitoshi is their sister. Latoshi believes he is bluffing, and attempts to kill the unconscious girl. However, she is saved in an instant by Serenity.

When Mitoshi awakens, she opts to challenge Latoshi to a fight after Antoshi refuses to. Unaware of just how weakened he is from Lazarus constantly draining his Ki, Latoshi is easily defeated by the girl who had no previous fighting experience. At that point, the group is interrupted by the appearance of a well-dressed young adult man. He reveals himself to be Collin, Serenity's brother. Collin explains how he was formerly possessed by Lazarus, like Latoshi currently is. Afterward, Collin takes his leave, as does Latoshi, followed by the others.

Antoshi and Mitoshi continue to get along for a while, but both of them are concerned for their brother. Several days later, however, Latoshi comes to the cabin, having cast away Lazarus' spirit. His two siblings eagerly welcome him, allowing him to stay with them in a bedroom all his own. Latoshi gladly accepts their offer, sleeping for the better part of four days. Mitoshi and Antoshi are startled when Latoshi screams from inside the house. After reaching him, he explains to them that he has regained all of his memories, and that remembering what took place horrified him. Antoshi and Mitoshi do what they can to comfort their distraught brother.

The following day, the three siblings and Fireball fly to what was left of Fern Town. The town had been remade into a memorial park, with thousands of headstones and plaques to remember the victims of the town's destruction. Latoshi goes on alone, finding his parents' graves. He speaks to them, finding closure in talking his thoughts and feelings out, before promising to see them again. The group return on home. With Latoshi seeking closure with his parents, Antoshi decides he needs to do the same. He and Fireball travel back to Saffron City, and discuss the revelation that he is adopted with his parents. They tell him that they had planned to tell him later on, wanting him to grow and live his life as a Pokémon Trainer first. Antoshi is comforted by their words, but also tells them that he's uncertain about his Pokémon journey for the time being. He wishes to stay with his siblings, a revelation which his parents are fine with.

After Antoshi and Fireball return to the cabin, a final decision is made to go and speak with the last set of parents left: Mitoshi's. Mitoshi attempts to contact her parents at home, but there is no response. The three siblings decide to go visit her parents at home. After getting there, however, a passing neighbor informs them that her parents were in an automobile accident. Terrified, the three accept a ride from the neighbor, who takes them to the hospital. Mitoshi frantically races to the room they're in, discovering that her mother is completely fine and that her father only sustained an injury to his leg.

Mitoshi brings in her siblings, much to the overwhelming shock and joy of her parents. The group sit down and allow their mother to explain the full circumstances behind their adoption. Antoshi and Latoshi share their stories as well, and all sides are relieved to finally be able to meet each other after thirteen years spent apart. The siblings eventually take their leave, and head back to the cabin.

Some time later, while the group are enjoying breakfast together, Antoshi notices a mysterious figure fly over their house, leaving what appear to be snowflakes behind.

Frozen Summer (2019)
As the group begin to learn to live together, a mysterious blizzard forms out of nowhere. The clouds consume most of the forest where their cabin is located, surrounding routes, as well as Goldenrod City. It continues to expand with no sign of slowing down. Antoshi, meanwhile, is forced to play peacekeeper between his two siblings as Latoshi and Mitoshi squabble with each other. An enraged Latoshi storms out of house to cool off, but soon rushes back home after finding a couple of nearly frozen Pichus that were passed out in the snow. Latoshi opts to stay with the two Electric-type Pokémon until they begin to show signs of recovery.

Having formed a strong enough bond with the Pichus, Latoshi and his siblings are able to communicate with them. The Pichus introduce themselves as Poka, a male, and Chika, a female. The pair explain that they believe the culprits of the blizzard to be a group of 'people who look like Pokémon' whom they encountered somewhere in the nearby forest. The sibling trio opt to head out together in the hopes of stopping the source of the blizzard, which has threatened the lives of those living in Goldenrod City while beginning to spread toward Ecruteak City as well.

Finding an oddly calm oasis of green within the forest, the siblings soon come across the first of the group responsible for the blizzard. A young man who possessed the black fur, golden rings, ears and tail of an Umbreon, calling himself 'Kage'. He feigns ignorance about the blizzard at first, but quickly tricks the siblings into falling under a hypnotic power. The three siblings endure realistic visions that torture them, with Mitoshi believing that her siblings, as well as Bubbles, Fireball, Poka and Chika had all disappeared from their cabin home and left her alone. While Mitoshi laments over the fact that she may never see her friends or family again, the trio help one another unlock the ability to communicate telepathically. With their new power, they deduce that they've been hypnotized somehow and work to fight to regain consciousness. Upon doing so, Kage uses another ability to create a shroud of darkness around them and render himself invisible. He strikes Antoshi, who soaks up the Umbreon-like young man's attacks without defending himself. After reading Kage's movements, Antoshi grabs him and renders him unconscious with a single strike to the neck.

Their next obstacle came in the form of a young woman, who also had the appearance of an Umbreon. She introduced herself as Celeste, and quickly found herself embroiled in a war of words with Latoshi, who was fired up and looking to strike back against the group that carelessly harmed Poka and Chika. The ensuing brawl between them was long and vicious, continuing to trade barbs as well as heavy blows. Antoshi is upset by the fact that Latoshi is letting his anger over what happened to the Pichus spur him into fighting. However, Antoshi is forced to watch from the sidelines after Latoshi warns him not to intervene. Latoshi eventually triumphs, leaving Celeste knocked out, but not without multiple serious injuries, including a broken arm.

They move on through a cloud of mist, into an area of the forest where a large, spiraling vortex is feeding its power into the clouds above. Antoshi deduces that the group's leader is within that vortex, and a young woman confirms his suspicion. She reveals herself as Myst, possessing the appearance of a Raichu. Antoshi attempts to reason with her, though like her friends she does not budge. Mitoshi opts to take her on, wanting to prove her worth as a fighter after weeks of training with her brothers. Antoshi soon realizes that Myst takes a similar, tactical approach to fighting as he does, and she quickly and easily gains the upper hand over the younger, inexperienced Mitoshi. However, Mitoshi is able to turn the tide of battle using her water form, rushing headlong into the stirring clouds above before raining down Ki-enhanced hailstones upon Myst and rendering her unconscious.

With everyone else out of the way, the sibling trio use their power in tandem to cause an explosion that rips apart the icy vortex. Where it stood was a young man who looked more human than his friends, though with the wings, tail, and feathery crest of an Articuno. When he awakes from his meditation, he is enraged at the trio. Once again unable to talk the group's leader into a peaceful resolution, Antoshi has no choice but to fight him. The blond-haired boy's speed overwhelms Ken as they fight midair, taking an early and decisive upper hand. Ken, like all of his friends, is enhanced with the power of the Pokémon he shared his appearance with. He uses his power over ice to freeze Antoshi solid, but he manages to break out of it. Antoshi creates a massive orb of Ki around Ken, trapping him in a maneuver he calls 'Red Giant', scorching Ken with his flaming energy before exploding violently. Seemingly victorious, Latoshi and Mitoshi come over to congratulate him.

Ken, feigning defeat, launches a large barrage of giant ice spikes at Antoshi. His siblings help him to fight them off, causing one to get deflected back and lodged into Ken's chest, mortally wounding him. Antoshi, wanting to prove that they were never enemies in the first place, uses an ability to heal using his Ki which he'd been learning from Serenity. Ken's gruesome injury is healed completely, leaving Antoshi sapped of energy. Ken and his friends finally relent, bringing the blizzard to a long-awaited end. Their group, now known as The Clique, is revealed to be old school friends of Serenity's, back when they used to look like ordinary humans. Ken leaves their story a mystery, and the two sides part on good terms.

The surrounding areas thaw out over the next several days, and life returns to normal for everyone. Antoshi helps his brother to become a fully fledged Pokémon Trainer when Latoshi asks the Pichus if they want to stay with him. They agree, and Latoshi 'catches' them in individual Poké Balls. During the night, however, a poster breezes by the sibling's cabin, advertising an upcoming carnival and its main attraction: the circus.

Powers and abilities
Mitoshi displays supernatural abilities early on; most notably, her ability to shapeshift into a watery form. This form can manifest as a pure liquid, such as when she escaped down a storm drain, or in a quasi-solid human-like form. Her water abilities protect her from damage, and stated she felt no pain when Latoshi struck her. Her ability can also save her from mortal wounds, such as when Latoshi ripped a hole through her chest with a Ki blast. Her powers appear to act as an automatic reflex when she's in danger, even if she does not consciously realize it, and forbids her from returning her form to flesh if she's sustained significant damage. She is able to 'refill' damage to her watery form with any source of water.

Like her brothers, she is able to communicate with a Pokémon that any one of them have spiritually bonded with. She can fly, project her aura around her body, and has some training using her powers. She is able to call upon her Ki as a source of energy to greatly enhance her speed, strength and defenses.

As noted by Collin, Mitoshi appears to excel greatly in defense. This is initially shown in her fight against Latoshi, when Mitoshi, despite being far less skilled at fighting, overcomes Latoshi with her water form providing her defense and injury mitigation. During the events of Frozen Summer, Mitoshi's water form not only provides protection against Myst's electric attacks, but allows her to counter-attack by launching herself into a storm cloud and descending upon Myst as striking shards of hail.

Like her brothers, she actively works to strengthen and sharpen her powers and skill. She has begun to overcome her previous fighting and Ki usage limitations with subsequent training with her siblings, as well as in her battle against Myst.