Koseki Bijou is a VTuber with Hololive English, debuting in 2023 as part of the Advent group, and fans quickly adopted Biboo as her affectionate nickname. Short greetings like hi honey were clipped from her livestreams and shared across social media as reaction sounds and stream alerts. The clip spread because it captures her playful, welcoming persona in under two seconds, making it easy to reuse out of context. It remains popular with Hololive fans for edits, soundboards and lighthearted greetings between friends online.