6 and 19 on Smiley, definitely! eue (poster below me, try to avoid the WIPs folder but anything else is fair game!)
2.Their emotional/moral weak spots
Io's origin, her village's culture and traditional aspects, have some pretty flawed and sometimes even nasty practices that Io doesn't deem/see anything wrong (not until it's practically slapping her on the face, a few years later). Some examples of it include: villagers who don't want to participate in dancing or singing traditions are stigmatized or just generally looked down upon even though they said it was free choice to do so or not. There is even Io's circumstances-- her marriage isn't a personal want, its a bargain chip, and the fact that while not explicitly done, Io was carefully cultivated to grow up being a perfect. loving, and caring wife, not a leader. She was raised with a certain goal in mind, yet despite all these backwards thinking, Io still loves her village and will not hesitate to defend it from criticism.
5.Guilty pleasures
Cold Ebony is one. She's kinda afraid to let Ignis know, despite her liking it better when it's iced Ebony instead (regular Ebony works too, but cold ones are just her guilty pleasure). Another thing is Ignis' pancakes. She only got to try it once and pretty much the best way to get her to calm down are iced Ebony and his pancakes.
9.Humiliating memories
There's three in particular she will never EVER forget. The first is: The very first time she met Noctis' group and she ends up thinking that Ignis' actual name is Specs. Up until they were finished with the hunt, she never did have any reason to call any of them by their names (she just concluded what their names were based on what she hears of them) so when they ended up camping, she blurts it out by accident. At that point, she already knows for sure what Noct, Prompto, and Gladio's names were. However, at that time, she was helping Ignis set up the cook ware and she just went ahead and called him Specs. When she got corrected, Io probably felt like digging herself in a well (to be fair, none of the boys also got her name until they met up again in Lestallum)
The second time is a bit more on the sad side for Io: It's when her fiance revealed to her that he never really did held up his end of the alliance, after she has painstakingly defended him from Ignis' criticism. At that point, her memories also returned, so it's pretty much a mix of humiliating and deathly humiliating memories (on the plus side, this is also were she starts falling in love with him)
The last one is probably the saddest and least hopeful of her humiliating memories: During the Hunt that got her injured. It was a big blow to her not only because she is injured to the point of turning mute, but also because she was blind-sided. Her job is to keep everyone else from being blind-sided and of all things to happen, her job is what crippled her. She takes pride in being able to help her friends and being good at it so her voice wasn't the only thing that was destroyed at that time. (it doesn't help as well that her voice rendered her useless for at least a few years, her profile stated that it took her a few years before she could hunt competently once more)
13.What gets them flustered
Hoooh boy, let's see...Ignis teasing her, Ignis being a romantic, Ignis when his hair is down, this girl is absolutely 100% always flustered when Ignis is around or is mentioned to her. She's a maiden in love, probably head over heels for that man, and while she churns out most of the jokes to her friends, she will always be speechless when turnabout happens and she gets teased with him. Even after they're married, she will still get flustered by the occasional romantic gesture from him and when others would note that "They're being lovey-dovey again". Everything else, she will be unfazed or would just smile it off.