Yeah, they would be cute as well. :'3
The only one (of the 3 main boys) that I don't see Lenalee ending up with, is Kanda... I've always regarded them more as brother and sister than anything else.
I wonder what's up with Mugen...
Talking about the Katana though... I still think the 6th Illusion will show up... somehow, and that that one will have severe consequences for Kanda... I don't know yet if they'll be bad or good, though...
I can't stop picture Mugen as a Dragon ever since I drew it like that ._."