Psions

Psions are a new category of Aragami first introduced in God Eater 2. They are heavily modified versions of other existing Aragami that possess new skills, known as "Blood abilities". They can disable any God Arc in the vicinity, making fighting them impossible for most God Eaters. Only the members of Blood, and other God Eaters who have awakened Blood Arts, can resist their control.

Blood ability
Kabbala Kabbala's "Oscillation" boosts the Oracle cells of both allies and enemies, inducing Enraged mode on other Aragami but also providing any God Eaters in the vicinity with a level 3 Burst. It is worth noting that this only takes effect when the Kabbala Kabbala is out of combat.

Blood ability
Magatsu Kyuubi's infamous "Killing Stone" ability allows it to create several orbs on the field that reduce the maximum HP of any God Eater in a large area surrounding them. These orbs can overlap, resulting in an increased rate of maximum HP reduction.

Blood ability
Marduk's "Pulsating" ability attracts every other Aragami in the field to the Marduk's position, while also triggering a forced rage mode on them.

Blood ability
Nyx Alpha's "Revival" ability enables it to heal any wounded Aragami nearby, just like God Eaters do with their recovery bullets.

Also worth mentioning is that, whether related to its Blood ability or not, Nyx Alpha is completely immune to melee attacks of any kind and can only be harmed with Oracle attacks (bullets, Impulse Edge).

Blood ability
Spartacus' "Oracle Absorption" ability allows it to absorb nearby Oracle Cells to increase its own power up to three times, leeching other Aragami's life in the process.

Blood ability
Yan Zhi's "Summoning" ability allows it to periodically summon minor, Ogretail-like Aragami called Zhou Wang to assist it in combat.

Its "Marking" ability allows it to "tag" a given God Eater, causing all Aragami to focus their attacks on the marked individual.