a cat is fine

...so is Lion cross-dressing?

Nonsense101 said:
...so is Lion cross-dressing?

from rifyu's other comics i think rifyu is under the mindset of lion being a girl

I'm not sure about that. There is a comic where Jessica calls him big brother, so it's more than likely cross-dressing.

Then again, there was also a comic of Lion being hurt about being flat-chested when Jessica sung Tsurupettan...

According to TV Tropes, under the Umineko Characters Page:
Ambiguous Gender: Very intentionally; The narration refers to them very gender-neutrally, they have an androgynous appearance, and nobody seems to know what their gender actually is.