Tetsu is a member of Sector Security who previously tried to arrest Yusei but later became acquainted with him through Jack during the Dark Signer Arc. Fun fact, he was already present as a minor character ever since Yu-Gi-Oh Duel Monsters as a bully. His ace monster is Goyo Guardian.
Reinforcement Can be used each time your Life Points decrease by 1800. Return 1 card from your hand to your Deck and draw a random Warrior-Type monster.
Respect My Authority! This turn, "Goyo" Synchro monsters you control gain 500 ATK per monsters on your side of the field whose original owner is your opponent. This skill can be used once per turn.
You're Under Arrest! At the beginning of the Duel, add 2 "Goyo" Synchro monsters to your Extra deck.
Parole! Return 1 monster that has been Special Summoned from your opponent's graveyard to your side of the field to their deck and increase your Life Points equal to the original ATK of that monster. This Skill can only be used once per turn and up to twice per duel.