Alektor

Alektor is Hairein's Black Trigger.

Overview
Alektor enables Hairein to create a variety of animal-shaped Trion bullets. These bullets are controlled remotely from an egg-shaped core that hovers above the his palm. According to Kōhei Izumi, Alektor's bullets, given their impressive offensive capability and complex movements, must consume a massive amount of Trion.

Abilities
Objects made of Trion that come into contact with Alektor’s bullets are transformed into Trion cubes. This process is known as "cubification" (キューブ化). Examples of objects that have been cubified include Trion bodies, bullets, and weapons such as Scorpion and Kogetsu.

Hairein can alter the size of Alektor's bullets to gain an advantage over his opponents. During his duel with Izumi, for example, he switched to smaller, bee-sized bullets in order to break through Izumi's defenses more easily.

Defensively, Alektor's bullets can be arranged to fashion a formidable shield. Alektor is also capable of absorbing Trion from nearby Trion cubes, which Hairein can then use to repair damage to his Trion body.

Alektor's main weakness is that its bullets are only effective against objects made of Trion. Accordingly, Alektor's bullets are ineffective against living bodies (e.g. an opponent who has deactivated his Trion body). It also follows that Hairein cannot use Alektor to defend himself against non-Trion-based attacks, such as attacks utilizing rocks.

During his duel with Hairein, Miwa demonstrated that a finely divided Shield can form an effective countermeasure to Alektor’s stream of bullets. Additionally, Alektor's bullets are incapable of catching exceptionally fast opponents, such as a Geist-enhanced Kyōsuke Karasuma. Furthermore, it has been shown that highly skilled Snipers are capable of identifying, and firing through, the small gaps between the bullets that form Hairein's shield. Finally, it is worth noting that Alektor's bullets cannot block Lead Bullet. However, as the weights resulting from Lead Bullet are made of Trion, Alektor's bullets can be used to cubify (i.e. remove) them.

Trivia

 * Alektor (αλέκτωρ alékto̱r) is the Greek word for "rooster".
 * Ashihara hinted that kindness may be related to compatibility with Alektor.