Punny, even more so than the male one. "Hey Tenno, I appeared again cause I got to think of another dad joke!"
Nervous, perhaps. "These barrels are safe, are they not? Wo-wouldn't want them to explode." "I'm not sure I can fight the Tenno, they seem so strong. Wait, are they listening?"
Overworked. "They sent me to you again, Adversary. That's my fourth mission just before lunch today. I need a vacation, I've heard good things about Cetus this time of the Earth-year."
Night Owl. Yawns daytime, seems happier/less grumpy night-time.
Childish: "Hahahahaha! Catch me if you can!" "I wanna play but the Queen says I must find you first."
Scientifical: "According to my calculations, this ship should have broken down already." "See that red star over there? So beautiful. In two million years it will... are you listening?" "Medicine won't be able to fix what I'll do to you."
Sporty: "Up and at them, my grineer! Don't be lazy!" "I have trained for this moment, Tenno." "I shall kick your dainty head off like a Lunaro ball!"
Earlier examples in the order I like them: Groovy, Clumsy, Delusional, Warframe superfan, Absent-minded, Soft-spoken, Whiner, Fear of queens (cause hey, makes lotta sense), Stalker superfan. Well thought, you people!
And quirks really aren't that common, which is a shame. Have had 1 of 13 liches had a quirk.