Wanted to post this here because I'm proud of this ref! My OC (okay it's a self insert, fight me) for My Hero Academia~

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Name: Seppen Shijinko
Nicknames: Seppen, Snowflake, Cici
Age: 24
Birthday: February 13
Quirk: Winter Reign
Hero(?) Name: Snowflake
Likes: Marshmallows, salty things, lavender (the color, flower, and scent), ribbons (especially red ones)
Dislikes: Thunderstorms, spicy things (she can't even tolerate bell peppers), bees

BACKGROUND

Seppen is naturally generous, caring, timid, and empathetic, but rather naive. She's happiest when helping others and keeping her friends happy, but she can easily forget about her own needs in the process. She struggles with severe anxiety, insecurity, and a fear of failure, which she feels gets in the way of helping others on the scale that she wants.

At the beginning of Seppen's high school career, she attempts to combat these troubles by enrolling in UA's hero course. She hopes that pushing herself past her comfort zone will force her to become more confident and conquer her insecurities, in order to keep up with the high standards and challenges set by the school. This small burst of conviction is enough for her to put on a compelling performance during the entrance exams and get accepted into the program, though only barely.

During her time at UA, she meets and befriends Aizawa. After seeing her performance in the entrance exams and learning of her reasoning for enrolling, he comes to admire her goal of pushing herself to be better despite her inner struggles. Because of her gentle nature and her Quirk, he gives her the teasing but affectionate name of "Snowflake." Likewise, Seppen is inspired by Aizawa's diligence when it comes to his training and studies. She likes how he can be understanding and sympathetic when he needs to, without coddling her or sugar-coating his words. The two become fast friends, much to the surprise of her classmates (though Hizashi is just happy that Aizawa is socializing more).

Unfortunately, Seppen's insecurities catch up and get the better of her. Not even a year in, she cracks under the pressure of the hero course and drops out, convinced that she simply doesn't have the dedication and courage needed to become a hero. She finishes her education at a normal public school instead. She is so ashamed of disappointing Aizawa's expectations of her that she can't even bring herself to keep in contact with him afterwards.

She ends up living with her best friend of many years prior to UA, Alia, who had successfully graduated UA's hero course and now has steady work as the Pro Hero Madame Roseate. Seppen still lacks the confidence to do real hero work herself, but she's eager to support her friend when she can get away with it. For no real reason but her own amusement, she decides to give herself an unofficial hero name, too - the one her old friend gave her years ago - Snowflake.

Months later, Seppen and Alia learn of a reunion being held at UA, celebrating the successes of graduates who are now Pro Heroes and staff members at the very school they attended. Alia, having had an old flame there in her high school years, encourages (and eventually convinces) Seppen to join her.

As luck would have it, Seppen runs into Aizawa. He first expresses surprise, then concern about what had happened back then, curious to know where she'd been all this time. Embarrassed, Seppen comes clean about dropping out and avoiding contact with him, but she's shocked to hear that Aizawa isn't upset with her. In fact, he had always thought that with her selfless and generous personality, she had plenty of potential at UA, even if she had chosen a different direction than the hero course. He's only disappointed that she didn't realize it before throwing in the towel completely, but he's still happy to see that she's managing in the world. Though still uncertain, she's flattered at his praise, and the two easily begin to reconnect - this time, blossoming into a romantic relationship.

Today, Seppen is still not confident enough in herself to become a Pro Hero, but she takes Aizawa's words to heart and finds a happy middle ground where she can keep helping others. She lands herself a position offering emotional and psychological counsel to the young students of UA. Her gentle personality makes it very easy for others to confide in her, and those that seek her guidance walk out happier than they came in, which is exactly what she was working towards in the first place.


QUIRK

Seppen's Quirk allows her to manipulate the air around her, making the temperature colder and freezing moisture particles. She can reform said frozen particles in various ways to enhance her attacks or provide support. It's naturally more effective in humid areas. Seppen can still create ice in dry areas, however it is much more brittle.

She is vulnerable to heat, and becomes sleepier as the temperature around her rises. Extremely hot environments (e.g., areas heated by the use of Quirks such as Endeavor's) can cause her to fall asleep almost instantly.

Though her body can generally handle the freezing temperatures of her own Quirk (and others'), overuse of her abilities will eventually begin to cause hypothermia and frostbite. However, this is a very rare scenario, as she is rather conservative with her Quirk usage.


ABILITIES

Frigid Reinforcement - Seppen can coat her arms or legs in solid ice to reinforce any punches or kicks.
Glacial Barrier - Able to encase her whole body in a block of ice for protection. However, she is completely immobile until the ice is broken.
Blizzard Cloak - Seppen can conjure a blizzard that makes it harder to see her.
Snow Healing - The snow she creates has special healing properties that can treat moderate, non-fatal external wounds. It can't repair broken bones or internal injuries.


OTHER FACTS

~ Seppen Shijinko is not her real name. She and Alia were born and raised in America, becoming friends in their early school days before moving to Japan together to apply at UA. Though Alia kept her English name, Seppen was more worried about standing out, so she opted for an alias that fit her Quirk. Only three people besides herself know her real name: Alia, Aizawa, and Endeavor.
~ Her last name, Shijinko, translates to "child of a poet." It doesn't necessarily relate to her quirk, but it is the meaning of the name that her real last name is derived from.
~ She has Tourette's Syndrome, which has earned her the endearment of Kaminari (I headcanon that he also has Tourettes, as a side effect of his Quirk). It's also earned her the nickname "Squeaks" from Bakugou, which she despises with a passion.
~ She collects the fortunes from fortune cookies, as well as ribbons (be they stray, from a gift, from clothes, or bought in spools). She has a photo album for the fortunes and multiple boxes for the ribbons.