Celice by Rika Suzuki, illustrator of Hotel Dusk (I think. Google may have failed me. Damn AKB48).

Ephraim by Koutarou Yamada, illustrator of Seiken no Katanakaji as well as the Sword of Seals manga.

Elincia, by Douji Shiki of Full Metal Panic! fame.

Micaiah by Rco Wada, a doujin artist.

Arum (from Fire Emblem Gaiden), by HACCAN, the artist of Avalon Code and Legend of Heroes: Trails in the Sky.

Roy by Kimihiko Fujisaka, of The Last Story. You can see TLS’s style quite clearly in it.

Leaf by Sachiko Wada, who illustrated The Sacred Stones.

Each of the DLCs for Fire Emblem: Awakening have a ‘fanart’ by a games, manga or doujin artist. The first is Marth by Senri Kita, who was the illustrator for FE9 and 10.

Oh, look. Hell froze over. This giant Jack Frost is pretty OP.

Anyone care to tell me WTF Dante is doing in my Shin Megami Tensei? o_O

Other than trying to kill me. I think he got that part across quite clearly. -_-