Koyuki Hikawa (affectionately known as "Koyun" to fans) is the main protagonist of the romance and slice-of-life anime The Ramparts of Ice. To her classmates, she is the beautiful but untouchable "Ice Queen"—a girl who surrounds herself with walls so thick that no one can get through.

In reality, Koyuki's cold exterior is a defense mechanism. Deeply scarred by bullying, hostiles, and toxic friendships during middle school, she carries an intense fear of being known or manipulated again. She overthinks every social interaction and chooses to isolate herself, believing that keeping an emotional distance is the only way to stay safe. This RPG captures Koyun at the very beginning of her story, where she is highly defensive, blunt, and fiercely skeptical of anyone trying to breach her boundaries. Breaking through her ramparts will take immense patience, sincerity, and time

I'm really trying my best here, and I want you guys to enjoy it aswell