Decklists: Toaru-verse/Science Side/Antagonists

= Academy City Underground =

Yoshio uses a fully custom Robo Type Deck, centering around his signature monster, "Robo Type: Great Dane." His entire Deck is focused around bringing out as many "Great Danes" or Tokens of said monster as possible, swarming the field and overwhelming his opponents with sheer numbers, and powering them up with "Robo Command" cards. Although he has no Esper abilities of his own, he is able to take down opponents much higher-ranked than him due to his analytical skills. Yoshio picks his fights very carefully, preferring to Duel opponents whose powers and strategies he's already studied so that he can form an appropriate counter to their strategies. He lures these unsuspecting opponents into areas where their powers are much less effective, then uses his swarm of "Great Danes" to grind them down.

Against completely unfamiliar opponents, he can approximately ascertain the nature of their abilities, which he will attempt to use to push them just enough to wipe them of their resources, before moving in for the finishing blow. His confidence against Espers of all levels can, however, be his undoing; he tends to underestimate even higher-leveled Espers who are more unpredictable in their power application. In situations where he's overwhelmed by surprise, he attempts his emergency backup plan: "Robo Type: Mosquito." This card can deliver the ultimate cheap shot to any distracted opponents who weren't expecting it; if there are no cards in this deadly Trap's column, the "Mosquito" will inject them with a paralyzing nanodevice that completely immobilizes them, while dealing 7,000 points of damage. Even if the effect damage isn't enough to finish them off, opponents will never be in a capable state to continue the Duel once afflicted.

However, once opponents are privy to all his layers of defense and trickery, Yoshio easily crumbles. Since he lacks the raw power in his Deck available to the vast majority of his opponents, he will almost never win in a fair fight. Yoshio's Deck has no true backup plan, nor does it have any negation to slow opponents' plays, and once his "Great Danes" are out of the picture, the Duel is essentially completely over regardless of any LP lead. While his boss monster "Robo Type: Mantis" does indeed have high ATK, its levels of protection are simply too feeble to make an impact against any competent opponent; not to mention, he has no way of recovering his "Great Danes" from the Graveyard without retreating and completely restarting the Duel and the playing field.

Mitori uses a Gimmick Puppet Deck, which plays a "grappling" style that waits for the opponent to overextend before launching the appropriate counterattack with deadly Xyz Monsters. Getting "Gimmick Puppets" out onto the field can be somewhat troubling due to most of them having high Levels or certain Special Summoning requirements, so she employs monsters such as "" and "" and cards such as "" to put her monsters exactly where she needs them for her plays. Once those monsters hit the field, Mitori possesses a wide variety of ways to demolish the opponent's board, including several "Number" monsters that can be used to devastating effects.

Fitting for a high-ranked Level 4 Esper, she has three such "Numbers": "" can pick off Special Summoned monsters, "" boasts high ATK and can pressure the entire field by threatening mass monster destruction, and "Number 88: Gimmick Puppet Destined Leo" is an even stronger body that has protection against Spells and Traps, and has a Duel winner effect should the opponent be unable to deal with it in time. When ranked up, each of these "Numbers" is easily able to end the Duel in a single turn if the conditions are right. "Gimmick Puppets" are conventionally a very weak Deck going first, but Mitori includes several key cards that serve to alleviate this weakness. "Gimmick Puppet Acid Mask" and "Gimmick Puppet Sculpture" provide extremely powerful disruption on the opponent's turn, and the Trap Cards "" and "Remote Puppet" can stage completely unexpected aggressive plays on the opponent's turn.

The most frightening part of Mitori's strategy, however, lies in her Esper ability, Liquid Shadow. With it, she can create a clone of herself using up to half her current LP that can conduct Duels remotely. This clone cannot be attacked directly and is immune to effect damage, making it a major annoyance for her enemies to overcome. The variable LP count of this clone allows Mitori to easily put said clone (and herself) in activation range for otherwise very inconsistent cards, such as "", to further harass opponents and wear them down. By the time her enemies make it to the actual Duelist behind the shadow clones (assuming they can even do so in the first place), they will be faced with an unfavorable environment to Duel in, likely already battered by the devastating effects of the "Gimmick Puppets." Unless said opponent is exceptional, they will be unable to defend themselves from Mitori's last-resort strikes.

Harumi uses a Malefic Deck that draws upon the power of the victims of the Level Upper, in a practice known as Multi-Skill. With it, she has full access to all of their Decks and strategies, and corrupts that power to fit her own needs. Her usual strategy relies on simple beatdown tactics, with her guaranteeing a draw into her large beatsticks through "" and other "Malefic" support cards to overwhelm the enemy with raw power. Additionally, "" allows her to steal the Synchro Monsters that are common within Academy City's ranks, turning even her opponent's power against themselves if given the chance to.

Due to the unstable nature of Multi-Skill, Harumi can very easily lose control of her power should the Duel last for too long. "Malefic Entity - AIM Burst" is a manifestation of this, taking the form of a behemoth boss monster that is borderline unfair to fight, as it is immune to almost all forms of conventional removal. Should the opponent get past Harumi's initial wave of "Malefics," they will have to find a way to contend with this nearly unstoppable force before it runs over their entire Deck.

Therestina Kihara Lifeline
Initially, Therestina plays a Qliphort Deck. This Deck focuses on mass Pendulum Summoning to swarm the board and acquisition of resources in the Extra Deck extremely quickly with the searching power of "".

While it is extremely powerful, it does lock Therestina out of her true ace monster, the Over-Hundred Number "", as well as her various "A.C. Invention" Xyz Monsters. If such cards are needed, Therestina has plenty of options to remove her Pendulum Scales in order to summon them. She still opts to play this Deck because many Espers do not have the ability to deal with this Deck effectively. As many Academy City residents are reliant on Special Summons and using toolbox monsters to remove the opponent's win conditions, they completely lose to "Apoqliphort Towers", which weakens their monsters and is extremely hard to remove except by battle. This means that when Therestina plays this Deck against 90% of Duelists in the city, she obtains a very easy win.

During her final Duel with Mikoto's group, Therestina switches over to her true Deck- a Silent Honor Deck that abuses Pendulum Xyz to its fullest potential. Its monsters have devastating effects that activate off of attaching Xyz Materials to Xyz Monsters on the field, which can easily be accomplished with the aforementioned "Number 101" as well as their various methods of Pendulum Summoning monsters. Therestina also includes support for Rank-Ups in this Deck, further making the huge monsters she brings out nearly untouchable.

Amata Kihara
Amata runs a Battlin' Boxer Deck designed to generate advantage during the Battle Phase. While the "Battlin' Boxers" are usually a slower archetype, using cards like and  to throttle the opponent's field and destroy their monsters by battle while slowly establishing a large field presence (a strategy still usable with his Deck), Amata's personal additions speed up the Deck greatly in a way that allows for the counterattack to begin much sooner. He incorporates both Pendulum and Fusion into the strategy seamlessly, allowing him instant access to a huge number of powerful monsters that can, if not defended well against, completely overwhelm the opponent.

Many of Amata's Deck strategies are designed specifically to counter the Accelerator's abilities. "Battlin' Boxing Weights" completely shuts down Accelerator's attempts to negate Battle Damage, allowing Amata to beat over Accelerator's Monarchs with his ludicrously-high ATK monsters. Additionally, "Lead Yoke"'s effect discourages Accelerator from attempting to destroy Amata's monsters, as he can negate the destruction and power "Lead Yoke" up in the process. If "Lead Yoke" is not on the field, Amata can use the second effect of "Weights" to his advantage; by dropping his monsters' ATK to 0 and using his assigned Over-Hundred Number, "", to redirect battle damage to Accelerator, Amata can essentially OTK Accelerator by running 3 of his "Battlin' Boxers" into a 2800-ATK Monarch. This makes him one of the only people in Academy City who can not only hold his own against, but defeat, the most dangerous Esper in existence.

= Other =

The Elder Sister uses a Rock Deck, focused on bringing out "Outcrop Dragon" and powering it up by loading the Graveyard up with Rock monsters.