PokeOC friendos arise! What's one habit your OC is aware they should quit but haven't yet done so? For Grim would be smoking, but don't fret, he gets there eventually.
For Ophelia, it's probably her hesitancy to take big risks or put a lot of energy into something- be it her career, social life, or hobbies. She eventually learns how to really come out of her shell and make new memories :^)