Siren's correct.

The first time we met, you drew me. - The first time you met her, you use the "draw" command to acquire her as GF.
As gentle and beautiful I seem, - She's pretty and looks gentle when she plays her harp.
I can be deadly too. - She attacks enemies =.=
Wheat and Violet are my specialities. - Notice that when she attacks, there's violet/ purple colour sea waves and her harp produces those wheat-like golden thingy...

Well, congrats Holy and Andrew
But the turn goes for Holy since s/he got it first ^__^