Admiral Can play mahjong if there's a mahjong computer game assistant.

Yukikaze Knows mahjong but ain't got a clue about the rules.

Shigure Played a round of kiddie mahjong (donjara) once on the board game that Shiratsuyu snuck in.

Yamashiro Can play mahjong with average skill... but unfortunately this means she's stuck with the job of tutoring the three newbies.