Regardless of whether Chii is a lesbian or not, interesting to see this being done with her.
Playing up her wanting to share time with her friends and not being able to do it like before, and in turn, starting to become fond of Tokio for accompanying her to eat out so often now. The character can be annoying, she's implied to be comic relief but also pushy beyond compare, and as other people say she feels very underdeveloped (and rightly so, when she's barely had any focus on herself), though she at least has been stated to be simple: she likes to eat, she loves enjoying time with her friends, and she barely cares about anything else.
At least seeing that Tokio is actually doing chip damage to her is SOME kind of progress.