Well, it's kind of simple with Valentines Day coming up and all:
Pix is Cupid himself
Lulu is all heartsy and what not, (I'm terrible at drawing so I can't really supply a good drawing at all.)
Q - Pink arrows
W - Something similar to Miss Fortunes passive with the hearts, when she uses it on an ally it has hearts behind them, when she uses it on an enemy they are turned into an angel.
E - Puts Cupid on an ally, Puts Cupid on an enemy. Basic logic
R - The teammate is a lot larger, hearts are going around them for the slow
Again, I am terribad with art so I can't supply any form of graphics.