From the upcoming TP units the only useful ones (for a free player, of course) are:
- gold angel Erun (she has a extremely useful SAW)
- gold witch Ryuryu (pretty good skill)
- plat princess Louise (her AW ability is kind of a double-edged sword, but aside from that - she's pretty good tank with magical attack) - http://aigis.wikia.com/wiki/Louise