why?

For me, there are several reasons why I like Tio. First off, she's really cute and moreover also useful in battle. But that aside, she's a very interesting character who develops a lot throughout her (short) time in the game I think.

Th way she doesn't understand what a "heart" is and tries to analyze human emotions & feelings I like especially, although to me her ending appears a little kitschy (as most endings do, that is). Nevertheless it's interesting to witness her struggle to understand herself.

Also, her childlike innocence and serene aura impress me, and the way she's not influenced by beliefs or social conventions - most of the time, she acts like a person who has just been born (except for, of course, she's already old and knows how to speak etc.), a little quixotic.