Gakuto plays it because its name is a means of saying “NOPE”.
RD/CP01-JP006 ユル縞仙人 Yuru Shima Sennin (Shameful Striped Sage)
Level 6 EARTH Fairy Normal Monster
(An embodiment of worldly desires. Being harsh to others and soft on himself.
He is that kind of sage.)
Note: This card’s name is a pun on 許しません Yurushimasen (Unforgivable) and 仙人 Sennin (A Chinese Sage/Immortal)