This is a really old oc of mine, called star, she has quite a backstory but the summary is that her mother, took some kind of potion to able to devour another mare (jelousy reasons and so on) but after eh, she got pregnant right after this, and something went wrong as she kept the need to eat others during the whole gestation, at the end she had twins, both basically the sum of whoever she digested during that time, but while one (called rose, might draw her too in the future) was brilliant and so forth, star got the wrong end of it, especially as she got a permanent effect of that potion, making her costantly hungry even when completely full, and everytime she digests someone, his mind merges with her own, giving her quite some troubles (mood swings, change of personality, lack of focus, memories that are not her own). this trait is shared with her twin sister but while star is the chaotic version, her sister is able to “store” them in her mind for later reformation shenigans (while of course star is completely unable to do so)
 
she is supposed to be a border guard in the mountains, as the costant discipline helps her keep her focus and not just devour everything she see (and she gets to snack on random smugglers, hikers and so forth), also works as normal city guard, in the first designs i did a fuckton of time ago she had an helmet and a pair of undeveloped pegasus wings even if she has an earth pony body for the whole “mixed genetics of her mothers preys”. 
for the helmet i changed it into a more modern hat cause, if you didnt see my love for aryanne, i love cute ponies in uniforms (also all that fluttercop stuff from ab is to be blamed too :v )
 
for the wings i might add them if i draw her again