Smart and nerdy and awesome. Clearly this is someone who he should continue to harass about projects and things he wants to learn all the time, even if he is occasionally self-conscious around her because she has an entirely different set of assumptions about what basic normal skills are. Mau in general is pretty comfortable around people who are more quiet and reserved; he's good at clowning and joking and being social, but a lot of that is a front he puts on to be normal and approachable and fit in. Company like Naoto's is generally more restful. He respects her intelligence and teaching skills and wants to get to know her better!

Reverse?