The mom had extra powers too (e.g. being able to produce a chocolate that makkes her young again) seems like as they get older they get 1 angel power, 1 food power and then a mix of the two? Probably will get more and more gag powers.
On a side note yuusuke has gotten a new power from every strange entity so far, resistance to curses from fairy, able to speak to ghosts from ghost, possession form also from ghost and the ability to see the supernatural and create shrimp above his head from Mayuri. I wonder what he'll get from the angel and hell angel.
