My point was that, Iyana is the one who underestimated Keiko, lol. All Keiko did was sigh and ignore her, because she didn't feel like talking about what she did in battle. o.O Keiko doesn't even think about Iyana...like, at all, because she doesn't know her. So to someone like Keiko who keeps to herself, and doesn't boast. She thinks Iyana is immature and childish. It kind of seems like Iyana wants to be underestimated, because Keiko is often underestimated, but she keeps to herself and prefers it that way. Keiko and Iyana are the same in that sense, but one likes to 'prove' people wrong while the other doesn't mind it. 

Keiko didn't sigh and turn away from Iyana, because she underestimated her, btw. She turned away, because again... Keiko didn't feel the need to address those comments. When did I say Keiko had underestimated Iyana or have her imply that? o.O It's not 'kinda' true.