@Kingaron hiding missing teeth is easy after the pain stops depending on how many teeths were lost. The ones in the back are not too visible and also don't affect pronounciation of words as much, although they will certainly hinder you when you eat much more than the ones in the front for most foods so you may need to eat slowly or feint muches on the back if eating with people. As long as you don't open your mouth while eating, yawn like a lion roaring or laugh with a wide open mouth you are pretty fine.
Injuries are kinda hard depending on where the wounds are and the weapon involved. She uses an (ice?)pick so while the injuries are relatively noticeable at first because she plunges that thing to draw lots of blood, the small circular form is much less noticeable as long as they are given a decent time to close the bleeding and later you can get past most people just by walking fast. Most things in the body can also be hiden through clothing and he has a vrey baggy sweater that could cover them easily. Overall, it's quite easy to hide wounds from friends and family, just try to avoid facial injuries like punches and big slashes in your body and you are kinda set.