Takoto kau

the emperium of man. he is a space marine made to protect the imperium.

Bail sharr the reaper prime of the carcharodons
the carcharodons Astra or space sharks his space marine chapter.

te kahurangi the chief librarian who serves as advisor and second hand to the chapter master.

Tyberos the red-wake, chapter master of the carcharodons.

sisters of silence also known as the talons of the emperor are psychic nulls meaning they have no soul and thus create a nullification of psychic energies around them.
They trained acheilus to use his own null abilities

likes to operate alone
his weapon if choice is the chain glaive
Is a blank meaning he has no soul and creates a psychic dampening field around him, the sisters of battle have trained him to use that power in more deadly manners, any psychic being can feel his presence pulling at them.
His mere presence can render psychic beings and demons to their knees in pain.

is very quiet

rarely speaks more than what is needed.

is a man of focus, commitment, and sheer will

can be reasoned with

dark and cynical, hardened by centuries of combat

Had great battle prowess and experience.
is great against tyrranids, demons, and psychic beings.

is very old since they use cryosleep while crossing the gaps between stars.

although his allegiance is to the carcharodons he is now serving in the deatwatch