"If I will not get caught, I will even without being paid."

For a Sickle, would you not wear robes to class?

"If I had to get a detention, I'd get it for something more fun than not wearing robes. Plus, I get cold easy. Nope."

For a sickle, would you attempt to perform a spell way ahead of your level, at an area in which a professor could find you?

"I mean... my closest friend is a prodigy at spells, he could watch me@Henry Knight "

for a sickle, would you buy ice cream just to throw it at the ice cream man?

"No. Absolutely not."

For a sickle, would you send a nasty howler to someone?
(Aka, do you have people dislike to that extent?)

Yes to people I dislike

For a sickle, would you owl the Headmaster and just say hi (for a random reason)

Yes.. Haha, just for fun. I guess the headmaster will just shake his head because I'm a kid who’s still innocent and clueless and maybe wonder why he admits me to Hogwarts

For a sickle, would you scream “TROLL IN THE DUNGEON, thought you ought to know” and faint?

"I don't think I can do the last part, unless it's just a staged acting."

For a Sickle, would you participate in a talent show but without any practice?

Probably.

For a sickle would you climb the highest tree on the grounds? but not the whomping willow.

Yes, I have a few talents

For a Sickle, would you pull a prank on the first person you meet outside your dorm in the morning?

Sure!

For a sickle would you do gymnastics all day?