Peraperâs (ぺらぺらーず, sōdo wārudo perapera ̄zu) is the name of a group of adventurering friends from Lomar in Alecrast. The group consists of Clespo, a human thief; Bellecana, a human sorceress; the elves Shiara and Mallough and the grassrunner Book.
The word “ペラペラ” [perapera] is a Japanese onomatopoeia with a variety of meanings. It's been pluralized with “ーず”, hence “Peraperâs”