We should point out that Homestuck is already our largest cast at ten, dwarfing literally every cast we've got. But the limit's fifteen so why not try to hit it?

We've got Nepeta and Kurloz (as you can see) as well as Meulin, the Disciple, the Grand Highblood, the Signless, Kanaya, Porrim, Eridan, and Dave. Adding to the list of specific requests are mine: All three Pyropes (but especially Terezi), Karkat, Jade, Roxy, and Equius.