hello! i apologize if this may or may not have been answered before, but i was wondering where i could find information about the lore of your world and more specifically, how our main three aliens work exactly

im asking mainly for character design purposes, however i am also just extremely curious about what exactly makes these aliens different from humans, like is the texture of their skin different? do Tilaari come in different types of colors? do the Kit maybe have rough skin like a shark? things like that.

just about any information that would inform me on maybe how to go about designing a character will do, but all information about them is welcome as well of course

this is of course if your all willing to indulge me, which if you end up doing, i would greatly appreciate it. thank you!!