Card Lores:Black Iron Heart, Sacria

This angel is the founder of "Iron Heart", the special force of "Angel Feather" dedicated to combat. She wields the mysterious magical capability of turning her own pain into power, which she has passed on to the rest of the Iron Heart troop. An apparent masochist, she seems to enjoy combat a bit too much, but regardless, she is often selfless to a fault, she thinks nothing of sacrificing her own comfort to help others, such as staying up all night to treat patients. She appears to have a hidden greedy streak, though, as she eats a lot and can occasionally be seen filching small amounts of money and food. She occasionally suffers panic attacks and displays signs of PTSD, causing her to frequently seek therapy from the "Blossom Healers" of Angel Feather, although she tries her hardest to withhold her past from them.

Her origins are unknown; she first appeared decades ago at the doorstep of one of Angel Feather's facilities, applying for a position. Despite her black wings, which marked her as a fallen angel, she was accepted, and while she was originally treated with suspicion, she began to gain the trust of the other angels due to her self-sacrificing nature.. She eventually joined the "Black Gravers", the special troop under the command of Gavrail, and became one of its lieutenants. It was then that she held a meeting with a top-ranking seraph of Angel Feather, and while the contents of their meeting remain unknown, Sacria persuaded the seraph to organize a special force under Sacria's command that would wield experimental armaments using Sacria's pain-conversion power. This was the beginning of the "Iron Heart" troop. She seems to be training "Iron Heart" for a specific purpose, but for what?