>>55587814She is another Ame, an average girl that you can feel connected and don't make you feel bad about yourself.
Talented women can feel threatening to most men, while a docile girl without any talent at all, feel more approachable and more realistic, it doesn't feel unrealistic to daydream about her being your girlfriend.
Every Idol group need the normal and average girl or boy, for the sole reason to make the Idol group more approachable to the fan.
All of Hololive gens have the Ame of the group.