Nintendo updated the Fire Emblem Awakening download content page with official art and some tiny screens for the two pieces of DLC that were announced at today's Nintendo Direct broadcast.
As detailed earlier in the day, Roy from Fire Emblem: Fuuin no Tsurugi and Leaf from Seisen no Keifu/Thracia 776 will be released as part of DLC scenarios on the 26th. The characters were respectively drawn by Kimihiko Fujisaka and Sachiko Wada.
While the game's first DLC, Marth, is free through May 31, these two appear to be purely paid content. Roy's scenario costs ¥250. Leaf's costs ¥350.