Yūma's Black Trigger

"Its ability is to learn other abilities and make them its own."

- Shūji Miwa reporting the nature of Yūma's Trigger.

Yūma's Trigger is a Black Trigger created by Yūma's father Yūgo Kuga to prevent Yūma's death. Since neither Yūma nor Replica gave it a name, they refer to it simply as Dad's Trigger or Yūgo's Black Trigger.[BBF Q183]

Appearance
When deactivated, it has the form of a black-colored ring with a thin white line running through the sides of the ring, forming two small circles which are parallel to each other. When activated it takes appearance of a black-colored jumpsuit armor with thin red lines running through it, and it covers most of the user's body except for their head.

Background
When Yūma still lived in the Neighbor world, he and his father, Yūgo, participated in the Neighbor Wars. During one of the battles, Yūgo told Yūma not to participate in this battle, because earlier that day they had found the dead bodies of some of their men, and they were some of the most powerful of their side. Yūgo suspected it was the result of the other side having a Black Trigger. Yūma, however, just pouted and didn't really think much of his father's words. After his father had left to go fight, Yūma left their side's fortress and went outside into the battlefield. Seeing multiple battles he could help win, he decided to make stealth attacks eliminate some of the enemy units. But during his exploring, he ran into an unknown enemy, and wasn't strong enough to defend himself, resulting in his near-death. Yūgo, finding Yūma's wrecked body, created a Black Trigger, a ring. He then sealed the body of the dying Yūma inside the trigger, substituting it with a body made of trion (with which his hair is white); thus saving Yūma. However, this took all of Yūgo's power, and so he turned to dust, crumbled and died. Replica theorizes Yūma's body, although sealed, is still degrading, and Yūma will eventually die.

Abilities
The primary asset of Yūma's Black Trigger in combat is an arsenal of versatile seals that create different effects. Its power is such that, coupled with Yūma's exceptional fighting skills, it allowed him to incapacitate two A-Rank Border agents while attempting to neutralize them peacefully, and even to defeat the mighty Organon user Viza.

Aside from the seals, Yūma's Black Trigger has a series of abilities that are unique even among Black Triggers. Most remarkable is the one associated with the purpose of its creation, the permanent substitution of Yūma's fatally wounded flesh and blood body with one made out of trion in order to slow down his death to a near halt, meaning some functions of the Trigger are constantly active. The trion body itself has three main peculiarities. The first is its ability to repair itself almost instantly when damaged, which no other trion body possesses; however, this comes at the expense of its durability, as a car crash is enough to crack it. A second distinctive feature is that Yūma's trion regenerates itself despite him being always in a trion body. Lastly, this special trion body allows Yūma to activate other Triggers normally, causing it to be swapped with an ordinary combat body generated by the Trigger holder in use.

As a side effect, Yūma no longer needs to sleep and has greatly enhanced physical abilitie even outside of a combat trion body. The uniqueness of physiology has proven to be an instrumental asset in battle that allowed Yūma to beat even Viza by taking him by surprise. Viza's defeat was made possible by another singular ability of Yūma's Black Trigger, which is the capacity to use its seals even without activating it properly and creating a combat body. The same applies to multiplier and compound seals. They can be used even when Yūma is in a trion body created by another Trigger.

Yet another singular characteristic of Yūma's Black Trigger is that its seals can also be used independently by Replica, a Trion Warrior, and its small avatars. Replica is also capable of fusing with Yūma's combat body. Indeed, Yūma's Black Trigger peculiarly reliws on Replica to bring out its full potential: it is in fact the Trion Warrior who is in charge of creating multiplier and compound seals, which it can do also through its small avatars, but the process will take longer. Furthermore, the Black Trigger necessitates Replica to create new seals through analysing other Triggers. These seals exceed in power the Triggers from which they are derived. This is linked to the Black Trigger's final ability: the capacity to accrue seals so that, once memorized, they can be accessed during future activations of the Trigger. As a consequence, the scope of its abilities can widen over time if the user has access to other Triggers. The exact conditions that must be met for them to be copied are currently unknown, although two are certainly the exposition to the Trigger in question and the proximity as well as the length of time required by Replica to analyse it.

The following is the list of the seals used by Yūma:


 * Bound (「弾」印 (バウンド)): A blue seal with the kanji for "repel" (弾) appears, which can send people and objects flying at incredible speed by repelling them. A person of flesh and blood would die either from the acceleration, or from reaching the other end, but it is safe for a person in a trion body to use it. It was first seen in Chapter 1 (Episode 1 in the anime) when Yūma used it to jump to the Bamster in the danger zone.


 * Boost (「強」印 (ブースト)): A seal with the kanji for "strength" (強) appears on the user's hand. It can be used to strengthen trion, such as in boosting the user's own strength or others', or to make an attack stronger. It was first seen in Chapter 1 (Episode 1 in the anime) when Yūma used Boost Double to destroy the Bamster in the danger zone.


 * Shield (「盾」印 (シールド)): A green seal with the kanji for "shield" (盾) appears. Yūma can use this to create a shield, but it can be penetrated by bullets which have no attacking power. It was first seen in Chapter 4 (Episode 3 in the anime) when Yūma used Shield Double to defend Osamu from the Marmod.


 * Chain (「鎖」印 (チェイン)): A seal with the kanji for "chain" (鎖) appears. Chains emerge from it, which can can be used to connect seals. It can also be used as a trap, when placed in the ground. Overlapping seals makes the chains stronger. It was first seen in Chapter 9 (Episode 5 when Yūma used Chain Triple in conjunction with Boost to bind the Ilgar which Kitora was battling and throw it in the river.


 * Anchor (「錨」印 (アンカー)): A blue seal with the kanji for "anchor/grapnel" (錨) appears, creating heavy projectiles which can be used to immobilize opponents. If not used in combination with Bolt, physical contact with the opponent is needed to use it. A technique replicated from Shūji Miwa's Lead Bullet. It was first seen in Chapter 16 (Episode 8 in the anime) when Yūma used it in conjunction with Bolt Quadra to immobilize Miwa and Yoneya.


 * Bolt (「射」印 (ボルト)): A red seal with the kanji for "archery/shoot" (射) appears. It is capable of a ranged attack by shooting trion, and overlapping the seal increases the range. By combining it with other techniques, their abilities can be used against opponents far away. A technique replicated from Shūji Miwa's Asteroid. It was first seen in Chapter 16 (Episode 8 in the anime) when Yūma used Bolt Quadra in conjunction with Anchor to immobilize Miwa and Yoneya.


 * Gate (「門」印 (ゲート)): A seal with the kanji for "gate" (門) used by Replica, which can be used to summon Trion Warriors. It was first seen in Chapter 69 when Replica used it to summon a Rabit to protect Osamu.


 * Echo (「響」印 (エコー)): A seal with the kanji for "sound" (響) that, by sending out soundwaves, makes Yūma aware of his surroundings, in a way similar to echolocation. It was first seen in Chapter 77 in Yūma's battle against Visa.

Users

 * Yūma Kuga
 * Replica