alright so pretty much as everyone knows by now, the "secret" chara is Neco Arc.
Highlight Arcueid, press Start and it'll switch to Neco.
Tried to highlight Nero and press Start to see if maybe NAC would be there too, but no dice.
Full Moon Neco is terrible terrible fail.
236 beams now have her hop up at an angle toward the opponent, then she fires his eye beams from the air.
214 is where she will burrow into the ground, however this is now a move that does damage.
214A will have her burrow into the ground, and a moment later she will spring up very high. Deals damage on contact, haven't found a way to follow up.
214B is different. If you hold the button, she will continue to burrow towards the opponent. Release button to have her pop up.
214C is not an EX , but she will stay in the ground for a longer period of time before springing up.
Her airdash is different, she'll spiral towards the enemy at a decent speed. (No longer the floating airdash)
Moves that are the same for F are...
j.236, j.214, 22, 623, 63214
She has a far reaching j.C (Her leg will extend outward)
Her 5C is different, somewhat resembles Satsuki's j.B (Where she crosses her arms...is that what it is?)
Her 5A is different, it now resembles the jabs she does in Kagetsu Tohya(Or was it Tsukihime?)
She can do a 6A, it's the same as MBAC verB2 6A, but only one. No Neco One Two Three.
j.2C is still there, j.2B is still there, chargable 2B as well, same as chargable 5B.
Not much to say, really.
http://jp.youtube.com/watch?v=O3oR9-bWhP4(Stage 4 is the greatest White Len Moe ever in Neco's arcade mode, I'll upload it later.)
Interesting/Funny note is first stage is Kohaku and Mech Hisui as a tag team.