Mook Lee is a sea serpent who lived in a village and helped the villagers where he could but died by a boulder when trying to save people. Mook at school doesn't have many friends but slowly starts falling for Aru as time goes along.

Mook is a calm and quiet person but he helps people when he sees they need it. often times, if he thinks something is troublesome, he will speak up about it. He is also a brave person, taking that from his previous life of helping the people where he lived.

Mook should have a mid range voice