Cors are something I like to call a "self-insert-adjacent", idealised as a version of me modified to be a more interesting fictional protagonist: they're allistic and extroverted and more energetic, more sociable, more impulsive, less thoughtful, less introspective, and more temperamental than me. They're smart, a bit arrogant, ambitious, impatient, and are always looking for the most important problem they could be working on; in other words, they're reasonably centrally glowprotags. They're universally bisexual and obligate poly, and often nonbinary but unaware of this fact.

On default Earths they are EAs and into AI alignment. They occasionally have a younger sister and an (as-yet unthreaded) even younger brother. Their relationship with their family (especially their parents) is often somewhat fraught, and takes some work (from both them and their family) to get to a state where they're comfortable with.

They're very attracted to and romantically compatible with J, but they're kind of slutty and will often have a lot of casual sex and occasionally get regular fuckbuddies.

Good threads/continuities to be introduced to the character are Dragon Fairy Elf Witch (and its sequel continuity Extremely Light Academia), Tamrielic Chronicles, Pyreflies, and Yggdrasil.