Mez was a short girl with a petite build. Her hair was blonde and styled in pigtails decorated with horseshoes that also served as weights. She had green eyes and her skin was considerably tanned. She wore long leggings and a shirt, which she left open, displaying a bikini/swimsuit top. Like her fellow Rakshasa Demons, she had armored plating on her forearms.
Mez seemed to be very easygoing, even when in combat. She casually seemed impressed by the death of her comrade and disappointed by the seemingly easy death of Lubbock. Her personality doesn't appear to change much even when her own life is in jeopardy, even going so far as to respond to Lubbock's flirting. Mez also did not seem to be afraid of death or killing others, noting that, as assassins, it came with the territory.
At some point in the past, Mez trained in the Kouken temple with the other Rakshasa Demons. It was mentioned that together with her companions, they fought and killed five Teigu users.
Mez and her companions came to help Elite Seven to defeat Oarburgh clan. With Suzuka, they were spying on their hideout. Mez was staying on guard when Suzuka slipped in their hideout. Later when other Rakshasa Demons and Elite Seven started ambush, Mez alongside with Sten and Elite Seven members fought Gilberda. After they defeated her they came to help Suzuka and Ibara with killing Cassandra.
Mez and her fellow demons were tasked with protecting Bolic from Night Raid. Mez with Sten found Lubbock as Night Raid member. When they thought that Lubbock is dead, they caught Pais. Then Lubbock, who was playing dead, came to save her. Lubbock tried to run away after Pais was saved, but Sten rushed after him. Lubbock used his string and killed Sten. After that Mez started fighting with Lubbock. She disabled his wires using her sweat. She was close to killing him but Lubbock used trick and Mez was the one who died.
She has similar abilities to the other Rakshasa demons. She can freely control her body. She has been shown to be able to do the following:
- Extending her arms;
- Extending her nails;
- Releasing a lot of sweat.
Aside from the ability to control her body, she has also been shown to be really fast. Her speed increased even more when she detached the horseshoes from her hair.
She was also able to sense that Lubbock was suspicious, despite Lubbock being one of the best actors in Night Raid.