Okay I love your theories and am a big fan but it completely perplexes me how you think Terezi <3< Vriska is viable. Their relationship is so, so different from anything that a kismesis has been shown to be; granted we've mostly only seen what a possibly unhealthy one was, but I really don't get the feel that Terezi <3< Vriska has been hinted before; has any chance of happening.
…wait, really?! It feels like you must have been reading a different comic! D:
Terezi and Vriska have practically been our prototype for what a kismesis looks like, even when it wasn’t working properly! Two rivals, getting under each others’ skin, who seek to improve themselves to one-up the other. It’s a mutually beneficial relationship founded on grudging respect, the parties constantly seeking recognition of the other. Kismesissitude was described as “an especially potent arch-rivalry”, and I dare you not to apply that label to Vriska on Terezi’s behalf. Hell, the word “rival” has been used more often between Terezi and Vriska than between any other two characters.