The Priest

The Priest was the carrier of the Orange Rainbow Crystal, which held one of the Seven Great Youma named Boxy. An anime-exclusive character, his real name is unknown; he appeared in Episode 26, and briefly in Episode 41. It is unknown if he had any special powers like Crane Game Joe or Ryo Urawa.

Anime
Unlike the other Seven Great Youma, Boxy does not have attacks that relate to his real life persona/profession; all of the attacks were boxing based and had nothing to do with him being a priest. Boxy, however, does retain the Priest's hairstyle.

Trivia

 * Although it's not officially confirmed, he might be the first non-Japanese character shown in the anime.
 * A priest also appeared in acts 17 and 18 of Pretty Guardian Sailor Moon (played by Victor Casale), although he was not possessed. The characters’ appearances in PGSM and the anime are similar.