Both. At first he trys to kill clary and jace, then allies up with the clave and rest of the downworlders to beat valentine in the city of glass.
David was not his mortal enemy, merely his foe. (this assumes that sentence is meant to be sentence)
friend or foe...no
foe
foe xoxoxoxo
foe
A foe
Don Quixote's foe and mortal enemy is the Enchanter. However, the Enchanter is also known as "Knight of the Mirrors" in the book.
Foe among friend is hidden though
Friend or Foe - album - was created in 1982-10.
Friend or Foe - song - was created in 2005-12.
fun
foe to the plants