Is there a praying mantis comic book character?

Yes, there is a praying mantis comic book character. The character is called Mantis, and she first appeared in The Avengers #112 (June 1973). Mantis is a member of the Cotati, an intelligent, plant-like alien race. She has a number of superhuman abilities, including the ability to control plants, project psychic blasts, and teleport. Mantis has been a member of the Avengers, the Guardians of the Galaxy, and the Defenders. She has also appeared in a number of Marvel Comics solo series.