KEL is one of the main four protagonists that joins OMORI from the start of the game. He is very competitive by nature, always wanting to win games or races. He's always getting into little tiffs with his friends. Even though he is loud and likes to annoy his friends, he genuinely cares and protects them.
KEL's role in battle is similar to an AoE DPS role in RPGs. When objects are too far to reach on the map, setting KEL as leader gives you the ability to reach them.
KEL is positioned in the bottom-right corner of the screen during battle. He is able to hit multiple enemies at once and is fairly fast. Whenever KEL passes the ball to AUBREY during his Active Chain Skill, she will smack it back at the enemy for extra damage. Any time when KEL passes the ball to HERO or OMORI, they get hit. Some kids just don't get along.
In the "real world" he is seen wearing a sports uniform and still plays there.