This is a drawing of who I would make Erina's older sister. She's kind of a redesign but also a fusion of the original ORIGINAL 'design' of Osana, a.k.a. Satoko of the Unity assets he tried to flip (and fail), Muja Kina, and Hanako. She is a more bubbly and fun nurse but she often gets taken advantage of. She's an aspiring nurse but at the same time she gets herself in tricky situations, including dealing with Erina's manipulative old friend.

Don't know if I had anything else planned. Sorry.