I think if I had to choose between being naive or suspicious, I would choose to be suspicious. At least that way if I am wrong I would be able to correct myself, it is a little harder to correct yourself if you do not have any idea of what you did wrong.

[Aki merely pulled her face away from Fubuki and chose to settle behind Tenya with an small and demure smile. Chuckling slightly at his shinki's reaction, Iida shrugged and offered Fubuki a smile of his own.]

It's okay, she is just a bit shy.