AGG:CORE has been very effective at creating realistic characters with minimal detail.
Sheridan CreightonThe main character. An entrepreneur that was forced to take on leadership of CORE due to his family being hunted down by the supernatural. He has since grown into it.
- Ambadassador: Is the primary diplomat of CORE, and has acted as such for the other 3 organizations.
- Character Development: In the beginning Sheridan was a selfish, foolish, and reckless individual, but eventually developed into a person driven to help humanity and protect it from the supernatural world.
- Elemental Powers: Mainly attacks using magic circles that blast opponents with fire, ice, or lightning.
- Long-Lived: A side effect of his magical ability. He can expect to live for centuries if he isn't killed. It used to cause him great fear before he got over it.
- Pragmatic Hero: Sheridan has set in motion several questionable plans that have hurt many people innocent or not. However it has always been a means to an end and he often regrets what he has to do for the overall good.
- Squishy Wizard: His main source of combat ability is from his magic, not his physical prowess.
Elena HeartHead of CORE's military operations, domestic servant of the Creighton household, and Sheridan's best friend. A True Dhampir and Vampire Hunter.
- Cool Sword: Uses a sword that can cut things while time is frozen.
- Expy: Elena Heart is pretty much an Expy of Izayoi Sakuya from the Touhou games, in appearance and abilities at least.
- Ninja Maid: Dresses as a maid, and acts as a household servant. Is CORE's strongest fighter.
- No Social Skills: Elena was so bad that she was essentially kicked out of Europe, from an organization known for their constant lack of manpower. She also broke the spirit of her ancestor through her rudeness.
- Time Stands Still: Has an ancestral artifact that lets her stop time.
- Vampire Hunter: Was one before she joined CORE. Still is.
Tomoko Yori.The one responsible for the management of CORE and its various front companies, and Sheridan's wife. Wielder of the Longinus, Telos Karma.
- Honest Corporate Executive: Straddles the line between this and Corrupt Corporate Executive. She has good intentions and makes sure everyone working for her is treated well, but she's using the lack of government oversight for CORE run business to completely dominate entire industries.
- Time Master: Telos Karma is the basis of all known time manipulation artifacts.
Serafall Leviathan, The Annihilating Wave
One of the four Great Satans, and by far the most powerful. She played a pivotal role in the devil civil war, and is quite possibly why her side won.
- The Ace: Has 3 max level traits for converting other stats to martial during combat, and has the stats to make use of all of them.
- Broken Ace: After killing a significant portion of her own people during a civil war, Leviathan finds it hard to work up the will to care about anything.
- Combat Pragmatist: Leviathan will not expose herself to danger needlessly, and will mercilessly exploit every and any advantage she can get.
- Masterof All: A major reason why she's so strong; she has mastered a far broader range of skills than almost any other living creature.
- One-Woman Army: The definitive in-universe example, she is considered on par with a large army from a strategic perspective. During a holiday she resurrected the entire garrison force of a city so they could join the festivities. Possibly serves as something of a deconstruction- she's shown to struggle with crippling issues stemming from having to deal out so much death.
- The Strategist: The primary way she leverages her mind, and a big part of why she's still alive despite picking fights with entire armies.