Rosa

Rosa is a non-playable character from Castlevania 64.

Character History
Rosa is a young woman who tends to the interior gardens of the Villa near Dracula's Castle. Some time prior to the beginning of the game, Rosa had been turned into a vampire and continues to inhabit the Villa. She encounters both Reinhardt and Carrie in the flower room of the Villa where she is tending to the roses (by watering them with blood). Rosa advises the adventurers to leave the Villa, but otherwise makes no effort to impede their journey. Rosa becomes a pivotal character for Reinhardt after this initial meeting. She is compelled by Death to attack Reinhardt in the Castle Center. She is beaten, but is spirited away by Death after the battle. Later at the top of the Tower of Clocks, Death lays a trap for Reinhardt. He is almost successful in cutting him down when Rosa appears and shields him from a barrage of sickles, killing her instead. Rosa is comforted by Reinhardt in her final moments, praying for forgiveness for her cursed soul and promising salvation before she fades away. Rosa's sacrifice fuels Reinhardt's rage and uses it to combat and defeat Death.

After Reinhardt destroys the true form of Dracula, the castle crumbles to the ground and the evil recedes from the land. Through divine benevolence, Rosa is given a second chance at life and is resurrected in front of Reinhardt. The two share a moment on the cliffside overlooking the ruined castle before setting off, indicating a potential romance between to the two.

Whether it is because she is only a recently turned vampire, or she has incredible willpower, Rosa appears to be able to resist the darker impulses of the vampire curse. During her first encounter she shows no aggression, and could almost be considered friendly towards Reinhardt and Carrie. Only through direct compulsion by Death does she lose her self control and attack Reinhardt. Further evidence of her willpower is indicated by her self sacrifice to save Reinhardt from Death's ambush, and also by her attempt at suicide by intentionally exposing herself to sunlight.

Boss Battle
In combat, Rosa wields a rapier, which she will use to occasionally attempt to slice her opponent. She also has a variety of demonic related abilities, such as mid air hovering and summoning fire bats. She can also create a small shockwave centered around herself expanding outwards. If caught unprepared, Rosa can easily overwhelm an opponent. However, given her passive nature, it is unlikely Rosa has had any real combat training and is only acting under compulsion from Death when attacking Reinhardt. Her supernatural abilities were most likely due to her vampire state, so it is doubtful that she retains any of them after her resurrection.