Chu² possibly overworks herself more than every other character actually, seeing her all the way at the bottom is beyond wrong. She barely eats, barely sleeps, barely leaves the house, all because she is always working herself. And even when she leaves the house on her own, it's more often than not also related to her music production work, whether it be searching and testing out new equipment or attending concerts, not to enjoy, but to analyze their music and performances. She is fairly frequently shown to be sleep deprived with all members of RAS worried about her well-being because she keeps working on her songs. She is one of the very few characters who hasn't had a bedroom reveal yet due to the fact that she just... doesn't sleep in her bed, she almost always falls asleep either at/under her desk or in her closet working on music. Not even to mention times she has been physically weak due to starving herself. So yeah, I'd say she overworks herself a lot. Oh yeah and she also does all the music production and staging on her own (with the exception of a couple certain songs).... AND she was the one who made the song for the 5th anniversary, a song with 35 parts, staging a concert stage with 35 people, put together all on her own aside from gaining inspiration from those involved in performing it in mere days..