Dion is a new character introduced in Metal Slug Attack, making his debut in the Extra Ops "Hot Trap".
Originally one of Abigail's spies, he was promoted to Lieutenant after she was impressed with his combat capabilities. He serves as her right-hand man and is a skilled fencer, using an elegant rapier to attack his enemies. He also carries a pistol for ranged combat. Much of his personal information is secret, as Abigail doesn't even know his actual name.
- He bears a resemblance to Raidou Kuzunoha the XIV from the Devil Summoner series.
- He is the second male character to wear sunglasses since Tarma Roving.
- Like the Aikawa sisters, Hyakutaro Ichimonji, and Sisilia, he runs away upon being defeated.