Tsukasa is so distinctive a character that, well, let me describe how he would answer it:
“Hi, sweeties! I’m Tsukasa, and if you have read any comics featuring me, you’ll know me as that one guy who wears dresses and acts all stereotypically feminine, y’know. Some’ll call me weird for that, but hey, what do they know about my exquisite interests!”
As for Haru, she would say something like:
“Uh… I dunno…”
Though her tomboyishness and shyness are distinctive characteristics!