(The following is based on a simplified translation and may be changed later)
Gabriela is one of the Seven Archangels. She governs plant life in the Angel World. She can manipulate plants and possesses great healing abilities, even among angels. She has a very strong affinity for plants, so much so that she consequently shares their weaknesses to fire.
She rules over the Safina region, which in the Angel World has been cultivated into a bountiful cropland that is referred to as "Heaven's Bread Basket". The people she rules over tirelessly work these fields and live humble, honest lives. She's considered to be merciful and kind for her immense healing abilities, and is said to personally "reward" hard workers.
Gabriela's flower arm can suck semen. She uses it to drain life energy from her foes and she could potentially drain them to death. She supposedly won't do this to her subjects because she's merciful, but to those who would point a blade a her... it's likely a different story.
She makes no appearances in Part 1 or 2 of Paradox.