Darker than Black: Kuro no Keiyakusha, Persona: Trinity Soul Recommendations
Both are sci-fi animations with a gloomy atmosphere and people who have strange abilities.
Have a similar dark atmosphere
the atmosphere is somehow alike and when watching your brain can't grasp everything because it's really confusing plot...
Both are action/scifi animes that use the action-battle-superpower framework to explore the simple facets of the human psyche. Troubled male protagonists with interesting but generally non-romantic relationships, unravelling conspiracies within which they are entangled.
Persona -trinity soul- is a tad more reflective and at a slower fluid pace, while darker than black has a wider with more unique powers.
The premise is extremely similar as both of them deal with people with supernatural abilities that are born after a mysterious event. However, whereas Darker than Black is more seinen, Persona is much more melancholic and slowly oriented.
Both series presents the same feeling with a dark setting and mood focusing on various characters with supernatural abilities.
Both series has action, some comedy, drama, and a mystery atmosphere that depicts the the phenomenal setting at its finest.