[Slow nodding, although Rui still can't properly look at Eren's face. This sort of thing is unexpectedly difficult. It's not something he's used to having to articulate.]

I don't usually like people. No, I mean. I like people, of course, I think they have amazing potential, I think they can do so much. But I like you differently and I've never dealt with that before.

I can't be a girl for you, because that's not who I am and it doesn't work that way. But nothing about me is different. I'm still the exact same person I was before you knew I was a boy. And I wasn't trying to deceive you. It's just something I... I really like pretty things. It's like someone who likes the color green, or who likes boots or hats. When I go out, I want to look nice. But I didn't mean to make a mess of things, and I'm sorry for not being more considerate.