oh hiii... thank you for taking interest in f'loe!
i honestly play xiv for raiding and raiding alone so there's not that much characterization in this verse but here's the things i cobbled through the years
f'loe's natural hair color is pink, it was bleached white for a short period in her adolescence since she (at the time, a closeted trans woman) considered it too feminine. she nowadays places a huge emphasis on coming off as cutesy and girly but that doesn't make her shy away from her love for the thrill of the battle
tailfeather->ul'dah to inherit her family's chocokeeping business, and she would watch the coliseum with her spare change! after saving nanamo in ARR she was given an honored entry into the gladiator's guild. there's not THAT much canon divergence/snippets from the MSQ that i can list, she more or less follows it to a T in the image she best thinks fit her chivalrous wol image
if i were to sum her up... she's kind of an egotistical dickhead LMFAOO she lives for bloodshed but upholds a rather hypocritical sense of justice. she by all means considers herself righteous and justice incarnate with no fault and it doesn't help that being revered as the all-perfect warrior of light inflates her ego. her interactions with anybody (scions included) come off as shallow and transactional, it is easy to confuse her extrovert-ism as any meaningful relationship. she is quick to dismiss any that she doesn't consider a convenience or a laughful, which drives a lot to call her two-faced
she's literally "i'm not funny but i'm actually mean and everybody thinks i'm joking"
by exterior she is still technically a nice person who has done no public wrong it's just easy to clock that there is something sinister underneath