Deep Insanity: Nirvana ; :The protagonist of the manga who is good at handling firearms and runs a store in Antarctica. She has a prosthetic right arm, so it can be used as a weapon. ; :A Sleeper who has a special resistance to Randolph Syndrome. While working on a hospital ship, he accidentally meets Yamada and together they go to Asylum in search of special items.
Deep Insanity: The Lost Child Antarctica Front Platoon Unit 11 ; : :New Sleeper recruit who hopes to become a hero. He is assigned to Antarctica Front Platoon Unit 11 where his skilled marksmanship becomes an asset to the group. ; : :Antarctica Front Platoon Unit 11 Commander who wields a huge scythe-like weapon and who appears to have the ability to make time repeat. ; : :Platoon Unit 11 Executive Officer and leader in the field. He is the most experienced Sleeper on the team and is an excellent swordsman. He formerly dressed as a woman and was romantically involved with Hayden but is killed during a failed mission in the Abyss. ; : :Platoon Unit 11 Sleeper. Due to an accident, he has a prosthetic right arm and a brain injury which has left him with a complete lack of fear or the ability to feel pain. ; : :Platoon Unit 11 Sleeper. She has a prosthetic right leg and is an accomplished artist who is interested in manga and anime. ; : :Platoon Unit 11 Sanity Anchor after failing to meet the Sleeper entrance criteria. A former
pop idol who was exploited and is embarrassed about her past.
Other characters ; : :Konron Enterprises Antarctic Branch Chief. ; : :Ararat Strategic Commander. ; : :Antarctic Branch Chief. ; : :He works for an organization whose motives are unknown. He has a severe haircut with
shaved sides and usually wears dark pointed tip sunglasses and is a former boyfriend of Leslie. ; : :She has the appearance of a young girl and wears a garland of small flowers in her hair. She works for Hayden and commands two blue, vicious, rabbit-like animals, Kamezou and Usazou, which she carries in a backpack. ; : : A young Exile girl living in an oasis area of the Asylum. She is viewed by Exile Cultists as the "Child of God" with the power to end the world and becomes the target of various groups in Antarctica for their own objectives.
Deep Insanity: Asylum ; : ; : ; : ; : ; : ; : ; : ; : ; : ; : ; : ; : ; : ; : ==Media==