Does/what is Himematsu's Suehara's ability?
Throughout she mentions being an ordinary or normal player, but it seems that she does have an ability. Evidence:
- she thinks to herself "can I adjust in time" when seeing the abilities of the other players
- ability to keep thinking & changing to win (i.e. how the situation is similar to 3-player majhong with Kasumi's ability active)
- The glow in her eye during the ending of the last Zenkoku-hen episode
- their weird coach saying something about abilities
... based on all of this, I think her ability (if explicitly described/shown as one) may be similar to Tsuruga's Kajiki in terms of changing to win based off what other players do. Perhaps stronger and/or better.