Ritsu is introduced/alleged as an okama (crossdresser), a bully whose favorite tactic is purple nurples. Ritsu's favorite food is chocolate crisps. Also Ritsu doesn't like Japan, but loves Korea.
Ritsu has a bustline but is shrewdly covered by the upper wear with no exposed cleavage. The official explanation for this is that missiles were built into Ritsu's torso, not a padded bra as some fans speculate. This also explains why he weighs 25 tons.