If you're looking for manga similar to Trinity Blood: Rage Against the Moons (Light Novel), you might like these titles.
Thousands of years in the future, the world is overrun by demons and vampire lords. Doris, a young girl, has become the target of the great vampire lord Count Magnus Lee, who wants her as his plaything. After being bitten by the Count, she seeks the help of D, an elite vampire hunter, who decides he must venture out to slay the Count and his demon underlings to save this girl in despair.
The year is 12,090 A.D., and what little is left of humanity has finally crawled out from the ashes of war and destruction. From the darkness of fallout, mutants and a race of vampires known as the Nobility have spawned. They rule the weak with no remorse. Once bitten by a Nobility, one is cursed to become a member of the undead. Villagers cower in fear, hoping and praying for a savior to rid them of their undying nightmare. All they have to battle this danger is a different kind of danger — a Vampire Hunter.
After the fall of civilization, a hierarchical society was born where blood determines everything. The rich steal both the blood and lifespans of the poor, rejoicing in their noweternal lives. Nagi is a commoner fated to die, while Saya is royalty, gifted with eternal youth. When fate brings their unlikely paths together, their innocent love set the gears in motion to tear down the walls of a society built upon tremendous inequality and racial discrimination.
Takes place in the world after the "end" and follows machine soldier Lear, who has been following the "Last Order" and continuing an endless war for over 100 years.
The world is deep and wide place. In order to know more about it, the Sky State Central dispatched the investigators Yoki and Shuka to conduct investigations around, and they do so while being very passionate and loyal about their work. This is a story of Yoki who wants to know more about the world and Shuka who loves the world. A slightly mysterious story weaved by these two people traveling around the world, meeting people, and sometimes even solving mysteries. "It sounds like it's going to be an amazing story, isn't it, Yoki?" "I wonder about that. I don't mind as long as Shuka-senpai is working seriously."
Karl is a holy vampire hunter from an infamous Van Helsing family…who’s been turned into a vampire himself. Though the evil Elliot now knows the taste of his mortal blood, Karl has somehow retained the faintest sliver of his humanity. How long will Karl’s tortured soul continue to waver between shadow and light? And are he and Elliot doomed to try to destroy one another…for eternity?
Since the eruption of Mount Fuji, the nights in Japan and this city have changed completely. Those covered in volcanic ash from Mount Fuji have become battle vampires, wielding tremendous power as they've started to kill each other and wash themselves in the blood of their fallen foes.