OK, so to answer some questions.

[@VitaVitaAR], I think the Jack O'Lantern is fine if you explain it as something the witch made herself, and imbued with a magical 'program'.  This program then eventually develops sentience because magic.

As for Cthulhu-type beings, the Preceptors occupy that position in this universe.  On their home planet, the preceptors are simply one single psychic entity without a body, without separation, without individuality, and prefer it that way.  however, to communicate with other species, they, or rather, 'it', has to send out 'globs' of consciousness.  Those globs separate and coalesce into individual entities.  It is these individuals who are the actual preceptors that the rest of the galaxy are familiar with.  These globs use their psychic energy to create a 'dummy body' in a shape familiar to whatever species they happen to be interacting with in order to be non-threatening.  These bodies are meaningless to the preceptors.  Three have been assigned to Earth, Mayura the Violet, Annatar the Red, and Saybrook the Green.  They have the vague shapes of a peacock, rabbit, and snake.  Their bodies are pure white and extremely fluid, when they move, it is like flowing cream.  Their eyes are like crystal beads of their respective colors, and in their forehead is embedded a transparent shape of that color, a Sphere, an Octahedron, and a Torus, respectively.  Right now, they are simply observing Humanity's growth, but their goal is to help Humanity evolve, but they will attempt to do it in a way that doesn't draw attention to themselves.  They are under very strict guidelines and are looking for loopholes to exploit.  They don't always agree with each other, are extremely arrogant, and have 'Final Forms'.  Their philosophies involve the dichotomy of Love (attractive force) and Terror (repulsive force).  Love is the force that brings all things together, seeking to become one, while terror is that which divides, creating individuality.  They scoff at other species' desire to remain imprisoned in their own terror and maintain individuality, they even hate the fact that they themselves are forced to be individuals while on their mission to Earth.  For the time being, they are not using their powers except for communication and travel.

I don't know much about the starfish summons, so I'd need more information to be able to determine how compatible they'd be with the Preceptors.  If I allow the starfish summons, then I would probably make them affiliated with Saybrook as 'he' has been on Earth the longest and is very much insane because preceptors are so used to Absolute Love, Unity and Oneness that being an individual is such a dreadfully silent and lonely isolation that it can send them over the edge.  Mayura and Annatar cope better.

[@Dead Cruiser], as for a 'digivolving Kamen Rider', I think the power is totally fine.  The main limitation with aliens is a political one.  The Jarav have to let the Preceptors on Earth because of the treaty, but for any other alien species, the Jarav will filter.  Aliens are not allowed to give information or share technology, they have to let humans learn and grow naturally.  The alien is allowed entry if they are 'here to help', which usually just means that they're allowed to be superheroes.  So the Jarav won't let aliens who have no business being on Earth on Earth.  So your character's alien parent is either a superhero (or was a superhero), or someone who doesn't care about the Jarav blockade and is living (or has lived) on Earth illegally.  Also, most aliens don't care about Earth and the preceptors are incapable of mating.  So explain your alien parent to me and we'll see.



So an edit I need to make to the opening post which I'll state here so you don't have to go back and reread the whole thing, The Age of Superheroes began at First Contact, which happened in the year 2020 CE, the current time in the RP is 30 years later, 2050 CE.  Technically, metahumans have always existed, but always in secrecy, though they existed openly in the age of mythology.