User blog comment:Alk'r Guardian/So far, which Assassin do you like the most?/@comment-13471981-20130922084622/@comment-13471981-20130922090714

Aveline de Grandpré is the protagonist of the game ACIII: Liberation, originally exclusive to the PS Vita but slated for re-release on PS3, Xbox360 and PC somewhere early 2014. Nikolai Orelov was the protagonist of a comic series, being an ancestor of Daniel Cross.

http://static9.cdn.ubi.com/en-US/images/AC3_5years_710x390tcm1977449.jpg

So, no, they are not DLC characters :/