Sena is one of Alu's friends.

What kind of person is he?

He is a skeleton ghost.He is also a sanga.He is the prince of Sanga-the-ghost City.
His soul is in Mubin's body.That's why he'll never die by attacking his own body.He barks 'sangaa'.

His attacks

1.maccho form=Becomes a maccho man and beat up the enemy.
2.meat form=Becomes a human.Please don't ask 'SO WHAT?'
3.sanga form=Becomes long and tie the enemy.To do this attack,he trained for hundred years.