Koseki BijouFanfic, x Reader & AI Roleplay

Koseki Bijou is a female streamer affiliated with Advent, the third-generation unit of hololive English. She is presented as an ancient magical stone formed from the crystallization of human emotions, and her design incorporates motifs of gems and rock. Her nickname is "Biboo." In contrast to the mystical premise of her origin, she is known for a cheerful, approachable personality, enjoying games and internet memes and joining in lively excitement.

Her appeal lies in the contrast between the ancient magical stone premise and her friendly character. While keeping the calm, mysterious air suggested by her look and setting, she brightens her streams with talk of games and internet memes, which makes her easy for viewers to feel close to. The nickname "Biboo" has also become widely established, and both her lore and her naturally cheerful side draw support.