<Ul> <Li> Martin Kratt (voiced by himself)--Martin (wearing blue) likes to give names to animals he finds, allowing the audience to bond with the animal . Martin is more the jokester of the two Kratt brothers . He is also often rushing and impulsive, unlike his younger brother, Chris . Martin is a little disorganized, emotional, and excited but knows when to be serious . In contrast to his brother Chris' climbing skills, Martin is a more experienced swimmer . He also likes to get into the mind of the animal at various times, saying such things as "Be the walrus!" He has a childish heart, due to his fun and humorous nature . He enjoys playing tricks on his brother . </Li> </Ul> <Li> Martin Kratt (voiced by himself)--Martin (wearing blue) likes to give names to animals he finds, allowing the audience to bond with the animal . Martin is more the jokester of the two Kratt brothers . He is also often rushing and impulsive, unlike his younger brother, Chris . Martin is a little disorganized, emotional, and excited but knows when to be serious . In contrast to his brother Chris' climbing skills, Martin is a more experienced swimmer . He also likes to get into the mind of the animal at various times, saying such things as "Be the walrus!" He has a childish heart, due to his fun and humorous nature . He enjoys playing tricks on his brother . </Li> <Ul> <Li> Aviva Corcovado (voiced by Athena Karkanis)--Aviva is the leader of the Tortuga gang, second in command to Chris and Martin . She designs all of the inventions the Kratts use, usually inspired by nature . She is an engineer and inventor . Once she has made up her mind, it takes appealing to her emotions and overwhelming evidence to change it . She is also competitive, rivaling Zach in invention contests, the Kratts, and even nature itself, most notably in "Cheetah Racer", where she bet that she could invent a land vehicle that was faster than a cheetah, although she was proved wrong . Her Creature Power Suit color is purple . For instance, she used this to become a Lawes's parotia in "Birds of a Feather", a groundhog girl in "Groundhog Wake Up Call", a Thompson's gazelle in "The Amazing Creature Race", and a giant female praying mantis to humiliate Zach in "Praying Mantis ." </Li> </Ul> <Li> Aviva Corcovado (voiced by Athena Karkanis)--Aviva is the leader of the Tortuga gang, second in command to Chris and Martin . She designs all of the inventions the Kratts use, usually inspired by nature . She is an engineer and inventor . Once she has made up her mind, it takes appealing to her emotions and overwhelming evidence to change it . She is also competitive, rivaling Zach in invention contests, the Kratts, and even nature itself, most notably in "Cheetah Racer", where she bet that she could invent a land vehicle that was faster than a cheetah, although she was proved wrong . Her Creature Power Suit color is purple . For instance, she used this to become a Lawes's parotia in "Birds of a Feather", a groundhog girl in "Groundhog Wake Up Call", a Thompson's gazelle in "The Amazing Creature Race", and a giant female praying mantis to humiliate Zach in "Praying Mantis ." </Li>

Who does the voice of aviva on wild kratts