Psions

Psions are a new category of Aragami first introduced in God Eater 2. Heavily modified versions of existing Aragami species, they emit unusually powerful bias fields that influence nearby Oracle Cells, thus exerting control over other Aragami. As God Arcs are themselves Aragami of a sort, they cease functioning in the presence of a psion, leaving most God Eaters helpless against them. Only the third-generation God Arcs used by Blood are unaffected by this. However, by awakening Blood Arts any God Eater can gain the ability to fight back against these creatures.

It is ultimately revealed that psions are the result of regular Aragami undergoing a mutation after coming into contact with the red rain.

Resonance effect
Kabbala Kabbala's "Oscillation" energizes all Oracle Cells in the area, inducing Enraged mode in every Aragami on the field but also providing all God Eaters with a level 3 Burst. This effect is only active as long as the Kabbala Kabbala is not engaged in combat.

Resonance effect
Magatsu Kyuubi's infamous "Killing Stone" 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, increasing the severity of the HP penalty.

Resonance effect
Marduk's "Pulsating" attracts every other Aragami on the field to its current position and forces them, as well as the Marduk itself, into rage mode.

Resonance effect
Nyx Alpha's "Revival" enables it to heal wounded Aragami, just like God Eaters do with their recovery bullets.

Also worth mentioning is that, whether related to its 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).

Resonance effect
Spartacus' "Oracle Absorption" allows it to absorb nearby Oracle Cells to gain a Burst-like power increase of up to three levels, leeching other Aragami's life in the process.

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

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