This is a summary of her lore and just explain her life. She will get more developments through time whenever I can so if it feels a bit jarring to read that why.

Seraphina was raised in Caliban. The homeworld of the dark angels. She had a family with parents that always had problems with eachother and some times would lash at eachother or at her and her little brother and sister and one time their were being attacked by the monsters in the forests. She was only one that survived and landed a view on them but she was a child and it barely did anything. She would have met their fate if it wasn't for one of the space marines squad showing up. The chaplain saw her being the only survivor and saw that she went and tried to fight the beasts and went through the process of becoming a Astartes whoever she was very rebel do to the trauma of seeing her family dying Infront of her and causing a mistrust with other people fearing she would meet the same fate. She survived the process and joined the 8th company, the assault squad. She climbed to the ranks with brutal violence with no remorse to the enemy Even ignoring orders to jump at the enemies faster which she was able to kill them. She did to sort of reclaim freedom of herself seeing the strick by the book chaplain as a resemblance of her parents. Lion noticed her behaviour and send her and the company back to Caliban for continuing to disobeying orders which she didn't like but she accepted the change since it was the orders form the primach. When Luther decided to fire on the lion and the response of that attack that destroyed Caliban let her scar that would haunt her forever. The look of the lion of fighting his own soldier like their were disobedience tools. From that moment forever she didn't ask neither question any orders and fought through the heresy just like her brothers did. Through time she grew bitter and tired and more fatal. The years grinded her humanity. Most of her friends either died in war or joined the fallen but her blade never faulted and only sharpen. She was given many opportunities to join higher rank but she refused them all. Remaining a lieutenant in the 8th company do to her not mentally handling it. For two thousand years she fought. For two thousand she bleed. Loosing one arm from a Tyranid trying to take the hit for one her soldier. Half of her face burned by a demon and scars through her body by war. In one of her missions her ship was stuck in the warp for unknown time and was only back in the modern day thank to now the returned primach however the warp had done it's deeds. The travel through time had ravaged her body. She could barely move or breath and she went through the primaries change. She didn't wanted to survive, she wants to rest in death. However her will refused to let her go. When she was awake she had a talk to talk with the lion. It was a deep talk and the lion realises the mistake of his past had altered her like a virus. She was now part of the arisen. Lost marines that were in Caliban before the heresy. Her squad was now located in a agri world. A farm world with similar vibe to her home. She still has many wounds to heal. But as long as he life she will hold her blade above.