Yūma's Black Trigger

Yūma's trigger is a Black Trigger created by Yūma's father Yūgo Kuga to prevent Yūma's death. Its real name is yet to be revealed.

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 death. Yūgo, finding Yūma's corpse, 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
It is a very powerful Black Trigger. With it, Yūma was able to defeat members of the A-Class Miwa Unit. He was also able to take down a Bamster with one punch. Replica merges with his trigger and forms seals for him to fight.This trigger has shown the use of multitude of abilities available in its arsenal. This trigger has sealed Yūma's real body, instead giving him a body made out of trion for day-to-day use. The trion body is weaker than his combat body but is capable of healing. It was was revealed in Chapter 16 (Episode 8 in the anime) that it is also capable to copy other Triggers' abilities, and even make them stronger.

There is probably a condition that must be met for Yuma's Trigger to copy another Trigger, although the exact mechanics are currently unknown. It has not been shown to have copied Kogetsu or Organon, for instance, even though Yuma fought against opponents who used those Triggers while using his Black Trigger.

The seals can also be overlapped to make their effects stronger. The following are 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" 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 agains Visa.

Users

 * Yūma Kuga
 * Replica