At the moment, Nutaku respected most known card tier. i.e. all the "co-ed party trolls" can be obtained from N-Gacha (3 sexy cards). Risa (her sis) is from N-gacha too.

Even card tier from events was respected. 1st and 3rd gambit has rewards (ranking and achievement) only available at that event and both was sisters.

If this scheme keep respected, Lisa should be released in N gacha.