My friend (who is a film and TV critic, with a particular love for the horror genre) saw My Soul To Take, offered this capsule review focusing on Raul's role, and with helpful information for the chicken-hearted among us.
Mr. Esparza is in perhaps the first 10-15 minutes of the movie. He has a bit of a one-man show as his various personalities come out and talk with each other. Now, there are only two or three bits *I* would consider jump scares -- when he's down on the floor, apparently dead, and the policeman leans over him, and again in the ambulance. However, be aware that once he gets off the phone with his psychiatrist, it *immediately* gets bloody (his "sleeping" wife is already dead). He appears briefly in a few flashbacks later in the film.
There is so much emphasis - well-done, for the most part - on the travails of high school life that much of the film plays more like high school dramedy than like horror. There's a wonderful scene in a science class that has no horror in it (although the symbolism returns later) where two of the main characters have constructed a giant condor costume for their class presentation that is surprising and hilarious. There is also a surprisingly sympathetic (without actually endorsing the concept) portrait of a teenaged fundamentalist Christian.
Again, though, there is a *lot* of blood and once things get going, there are a fair amount of "jump" scares (literally, where something on screen scares you with sudden movement). So if you (or anybody you speak with) plans on staying for the whole film, be aware of this.
Sarcasm is an allergic reaction to stupid people.