Arc System Works updated today the arcade version UNDER NIGHT IN-BIRTH Exe:Late[st] and added a new character called Mika. She is a new playable girl with two, huge armored arms with powerful rush skills. Arc System Works also published a promotion video which is introducing the new character and you can watch it above of the content.
If you are interested in more, try the game with her or watch the next UNDER NIGHT IN-BIRTH show on the NicoNico today at 20:00 (local Japan time) in live. Just visit this link and save it: http://live.nicovideo.jp/gate/lv267499984