Hoshimachi Suisei is a Hololive VTuber known for her passion for idol activities. She pursues her goals without hesitation and is praised as a key supporter of Hololive's idol aspirations alongside talents like Tokino Sora and AZKi. Despite a packed schedule, she balances work and rest effectively, avoiding burnout. She excels in gaming, notably achieving Hololive's first double watermelon score of 6344 points in the Watermelon Game after over 1000 hours of play, often dominating opponents. The 'School Uniform' version appears in fan art and cosplay, depicting her in a school uniform with stand-up collar.