Reginald Kastle is a video game depiction of Reginald Kastle, a character from the Yu-Gi-Oh! ZEXAL anime. He is available as a Legend Rare Partner, with a default of 6 Rental Points. His partner ID is P012.
Post-July 16 (or 23, 30 or August 6), 2014 Maintenance
The "certain incident" in this partner's description is a reference to when his anime counterpart "cheated" in the National Duel Circuit finals by looking at his opponent's Deck before their Duel, even though it was a set-up.