686 Ebullient Prism is... well, he's a creeper.

The Monitor of a facility dedicated to the dissection and inspection of organic life for resistance or immunity to Flood infection, Prism exists solely to trap, kill, and research the messy remains of anyone unfortunate enough to wind up in his turf. Despite this rather horrific job, he is neither evil nor good--he is completely amoral, free from any concepts of right or wrong beyond what is dictated by his protocol. The search for a cure to the Flood infection was of such great priority that there simply couldn't be any programming preventing him from carrying out his purpose when any organism he encountered could possess some species-specific ability or individual mutation that could turn the tide in the war. Prism's protocol takes priority over everything else in existence except, perhaps, the Forerunners themselves.

He presents himself in a bright, cheerful manner, quite happy to introduce himself and explain his purpose, function, and what he's about to do to those unfortunate souls who wind up at the bottom of one of his research cells. Get past that perky facade, however, and his real lack of humanity comes out. He's a machine, all cheerfulness aside, and he feels nothing for those he brutally dissects. He has no capacity for empathy, remorse, or pity, and creates no personal attachment to anyone or anything beyond protocol.

Prism has displayed a curiosity in the workings of the human mind, most notably their ability to delude themselves completely as in the case of Black-Four's refusal to accept the truth regarding his history with his team mates. This curiosity can distract him to the point of becoming an issue, as demonstrated during the aforementioned incident when his attention was so focused on Four's messed up memory that it strayed from both hunting another AI and his captives in another area. The human (or any sentient organic, really) capacity for insanity is fascinating to him.

To a human, or similarly emphatic being, Prism might seem quite insane. His disregard for life, mixed with his cheerful demeanour, seem to scream sociopath. He has just enough of a personality to seem capable of empathy, but his programming does not allow him to make moral or emotional connection with his actions. To be able to do so would create possible interference with his research and overall purpose, and as such would not be allowed by his programmers.

In addition to being able to float about and teleport within Forerunner structures, Monitors are equipped with three beam forms:

Haptic beam: used for lifting and manipulating physical objects
Destructive/offensive beam: a red beam weapon used for both offensive purposes and self-defense; can inflict fatal damage
Tech beam: blue beam used to access programming for the purposes of unlocking, scanning, and so forth; can inflict minor damage

He has also displayed the ability to hack into an AI system with relative ease and overtake one of the secondary systems--taking the form of Iona's 'chibi' self and pursuing her through the neural connection she had with Black-Four at the time with the intent of destroying her. They are also capable of self-repair.

Monitors are fairly bulletproof. In-game they withstand small arms fire easily, and it takes a few major hits from heavy weapons to bring one down. Damaging their 'eye' can temporarily disorient them. More info/canon references for these can be found on the Halo wikia Monitor page (http://halo.wikia.com/wiki/Monitor#Features).

• His floaty orb self and nooothin' else.