Hey! I see Sayaka got the bloody bone club from her Cornucopia run, and because of that (along with plain old continuing CR), I'd love it if Karkat could run into her at some point in the arena. It would freak him out pretty decently to see.

(I'm not sure how familiar you are with Homestuck, so forgive me if I'm telling you what you already know, but it's a clear association with subjugglators/murderous clowns/a couple characters in particular that Karkat has a bad past with both in his world and here in Panem now.)