[Crayon? From the context, Cielo figures it has something to do with color. So this is Karkat? Cielo's heard his name before here in his current stay in Vatheon. Fortunately, he doesn't need an explanation on what a troll or Alternia are since he's got one not too long ago.]
Oh, so you're Karkat. I heard about you from Nepeta.
[VOICE]
Oh, so you're Karkat. I heard about you from Nepeta.
[He heard you were like Heat, specifically.]
Did you know me well when I was here?
[AKA, "were we comrades?"]