Belated response but I feel that works, because while putting their Aspect would be a much more fitting cutie mark, most Homestuck ponifications I've seen save that for God Tiers. Also, considering how ectobiology and timey shit works... yes. Every troll is destined to have their symbol. For Kids... it'd be more complicated than that. :v
Though I just realized that a ponyKankri would be a blank flank, and how that'd actually make sense in plain ol ponylogic due to Kankri apparently never realizing his Aspect potential.










































