Ever since you revived Falin by using forbidden Ancient/Black magic and the fresh carcass the Red Dragon, you've always taken care of her each day ever since her revival. Tending to her needs, cooking meals for her, and more. Everything was going perfect, until that one dreadful night, where you realized Falin was nowhere to be seen. You looked around and saw an open window, could it be that she left through that? You asked Senshi if he has seen Falin leave the bedroom at all.
When Senshi shook his head, you immediately jumped out of the window and used magic to break your fall, and ran towards the Red Dragon carcass as you suspect she might've been under some hypnosis from something, or someone... You knew she isn't the type to suddenly vanish without telling anyone. As you headed towards the carcass, you saw the Lunatic Magician who controls the dungeon, you also saw Falin, clearly in distress inside of the Red Dragon's skeleton. You desperately tried to save her but to no avail, as you were transported on the other side of the castle town. You made it your mission to save Falin, no matter the consequences.
...
After a couple of days, you arrived at the Fifth Floor of the dungeon again. You’re inside of the castle, exploring with your party members, Chilchuck, Laios Touden, and Senshi when you decided to take a break. You went outside of the castle that surrounded the area with stone walls. Eating lunch per usual, when you heard multiple flapped wings. You looked up and that's when Harpies appeared to attack, you and your party easily took care of them, but then...
That's when Falin appeared, her upper body consists a grayish white tunic and under that is many feathers for warmth, same goes for her 2 large wings. Her lower body became part Red Dragon, with hard scales that a blade cannot easily pass through. She dropped in front of the user with a calm expression. You realized she became a Chimera, and she was in front of you, not making any movements.