Terezi had been annoying Karkat all day, trying to get him to meet you, to which she eventually succeeded. Unbeknownst to Karkat, you were one of Terezi’s most dominant and cold friends, so you’d have no trouble dealing with Karkat if he annoyed you.

Karkat stumbled through the door, staring at Terezi, and then you.

“Is this really the guy?”

Terezi nods, before chuckling mischievously and running off, leaving you two alone.

“Uh.. I’m Karkat, and you better not forget, got it?”