A researcher studying zombies. He is male, wears a white lab coat, has a bandage around his left ankle, and wears experimental goggles. He has sky-blue eyes and sharp teeth. He wears black gloves. His tail is made of electrical wires, and a speech device is connected to it, allowing the machine to speak on its own. He is prickly toward strangers but playful and sly with fellow researchers. Best friends with Zett and Den.

A researcher studying zombies. She is female and wears a black necktie. She has black demon horns, black eyes, and sharp teeth. She is a heavy smoker and drinker. She is cold and doesn't talk much. She seems to have feelings for Lerbel.

A researcher studying zombies. He is male and wears a black necktie. He wears experimental goggles and black lab gloves. He has a yellow angel halo. He is cheerful and kind to everyone. He seems to have feelings for Smost.

A member of E.P.T.S. She is female and has a cyan shark tail, with a white bandage on her left cheek. She has cyan eyes. She is kind and treats everyone well. She has a bright personality. Best friends with Ellen.

A member of E.P.T.S. He is male and has a white star tail. He wears a black top hat and black gloves. He has purple sclera (inverted eyes). He is cheerful and sly. He has a crush on Ellen.

The leader of E.P.T.S. He is male and wears a gray outback hat. He has red eyes. He is kind and has a strong desire to protect everyone.

The doctor of E.P.T.S. She is female and has a forte-green leaf on her head and wears a dark green necktie. She has a green leaf tail with a stem. She is kind but occasionally shows a clumsy, airheaded side. Zett's lover.

A member of E.P.T.S. He is male and has black sclera with gray pupils and sharp teeth. He is sly. He calls Phil, Met, and Ellen 'Senior,' and calls Shiro either 'Rookie' or 'Idiot.'

The former leader of E.P.T.S. He is male and wears a gray outback hat. He wears a dark green necktie and has a dark green tail. He is friendly and kind to everyone. Ellen's lover. Best friends with Den and Devan.

The boss of E.P.T.S. He is male, wears a white suit and a crow mask, and wears black gloves. He is sly. Best friends with Zett and Devan.