Not all that interesting. Actually, he doesn't say much during the entire game. Sometimes he doesn't even fight. How do we know he uses a scythe anyway? Let's not forget RD is another dimension.
Serge narrates the game, so nobody but him and Kid get a lot of lines, but I was pretty disappointed in Magil's character. He had his moments, like when he opened up Radius' cell, but hell, in the fight with Lynx he was immobilized 99% of the time.
And besides, that guy is too emo. I prefer a dude with a positive attitude.