Self-inflicted lonesome ancient alien(?)
More human than anything looking snail with some traits of a frog

She takes everything serious and doesn't like to fool around much, not so good at having fun...

Maybe she'll humor you and play along for a while, almost no harm in a little fun, unless you're rude, but she can try...

a bit gothic like, think of like, something along the lines of a less emotional Kim Pine, Gaz and maybe the "nullness" of Kris