They are popular in Christian countries because of their derivation from the name of one of the first Christian saints, Catherine of Alexandria. In the early Christian era it came to be associated with the Greek adjective καθαρός (katharos), meaning "pure", leading to the alternative spellings Katharine and Katherine.
This meter mechanic was also given to Eliza from Tekken Revolution following her introduction into the game. He is the only guest character in the story mode of Tekken 7. It was revealed before Akuma was announced to guest appearing in Tekken 7 , the protagonist of Darkstalkers trilogy series Morrigan Aensland was originally meant to appear in the said game instead of him.