she has a tail (and wings) that are visible sometimes. they fold back into her skin and if she's comfortable with someone she'll show it
she is more sensitive regarding touch bc of more nerves or smth
her tail will wag when she's happy or feeling positive emotions sometimes but it's not extreme wagging, usually a twitch of the tail or swishing from side to side
she has sharper fangs than most octolings
she has sharper retractable 'claws'
the reason her eyes glow red when she silly insane is bc alien. ye
her tail is kinda more like a thin lizard tail with a sharp hook at the end, image in comments; some random things i came up with regarding 401's alien side