Mera「メラ」 is a young girl who, like her group of friends, loves to role play the Seven Deadly Sins and order the villager around.
Not much has been revealed about Mera's personality.
Pelliot and the Fake Seven Deadly Sins were playing around in the village and ordering people order. Pelliot and the rest headed to the forest where they found the Boar Hat which surprised them since they weren't any bar there. Pelliot and got excited and went there, to order the owner to pay them for standing in his land. The real Seven Deadly Sins came out, and realize that the kids were playing them and King's information on the next Sins is false.
Meliodas told Pelliot that they were about to leave, Diane then appeared, thinking the rest has come back which shocked the Fake Deadly Sins due to her size and thinking she was about to eat them, but got angry at them. Later the Fake Deadly Sins got along with the Real Deadly Sins. Pelliot then told the Sins about the Mountain God that live in Ordan mountain. The kids were later informant from a villager that a group of Holy Knights Dawn Roar and the kids headed to the forest to find them.
Mera is an ordinary child with no super-human abilities.