Wooh, I agree tottally with what Celedam said.
Ayumi sure is an interesting person, I like her a lot lot lot.
Her look is very intriguing and it's what attaracts me the most - by her glance I can tell she's very smart. (It's one of those things that you see instantly but then it takes ages to find a way to describe them). It's like her eyes are telling that her life hasn't been very easy until now, and maybe it continues not being it, and that's why she seems kinda "resigned" fo some things, but even so, even so, she's absolutely happy with all right now and wouldn't change her life for anything in the world. She has learnt how to enjoy it and she has learnt to trust the future.
That's why I find her sooooooooooooooooooooo lovely

Maa-chan's character is different. She's extremely happy too, because she can get along with anybody,and she seems the kind of person that is gonna be happy just by being surrounded of people, and even more happy when the people she's surrounded by are happy too, so she's gonna do anything, even unconsciously, in order them to be it. I would say that almost everything she does is that-type-of-unconsciously and that genuiness is her strongest point - it's just amazing! And that's why she's SO charming!
There's also a bad side, though, and it's that she may find hard to change some things about herslef, if it's required by some factors or if she wants it to. Hope she finds a way to not to have to struggle with that, it's not easy and it's a thing that can be dealt by oneself.
All these are conjectures but I love this kind of brainstormings

(The expert of messiness and weird ideas strikes again

)