Rachel Alucard 
 Rachel with her two familiars

 

Name: Rachel Alucard
Origin: Blazblue
Gender: Female
Classification: Vampire, Former Observer
Age: Unknown (has experienced 72,500 years of time loops)
Powers and Abilities: Super strength, speed, durability, immortality (at least type 1), regeneration (mid-low level), magic, wind, electricity and weather manipulation, can summon various objects and familiars to attack, familiars can shapeshift, able to project a huge shield to protect a large area, retain her memories after each time loop, telepathy, mind manipulation via Red Slave, matter manipulationteleportation (of herself and others even across dimensions), portal creation, dimensional manipulation, can infect others with vampirism, resistant against temporal, mental and spiritual attacks
Weaknesses: Arrogant and likes to play with her opponents, forbidden to interfere with others to change the future (something which she willingly ignores, although later she got her punishment)
Destructive Capacity: Country level (her powers as an Observer put her on a similar level of power as Hazama)
Range: Several kilometers, also interdimensional
Speed: Relativistic (reacted to a blast from Take-Mikazuchi at the very last moment, whose beam can reach from mid-orbit down to Earth in a fraction of a second)
Durability: Country level, higher with the Tsukuyomi Unit (tanked a blast from Take Mikazuchi, an orbital strike which in other storylines destroyed the city of Ibukido and the surrounding mountains)
Lifting Strength: Unknown
Striking Strength: Class ZJ
Stamina: High (she was unfazed and never seemed to tire when fighting other characters, with the exception of Hazama)
Standard Equipment: Her familiars (Nago, Gii and various less important creatures), Tsukuyomi Unit (one of the three Sankishin Units and the so-called "ultimate shield")
Intelligence: Well above average, talented sorcerer and tricky, thanks to observing each time loop she has also great knowledge regarding various timelines
Notable Attacks/Techniques:

Notable OBD Victories:

Notable OBD Losses:

 

Other: This profile mostly covers Rachel with her title as an Observer, although it's possible she may have regained her strength by Central Fiction.

Not to be confused with the similarly-named character from HSDK or the two similarly - named characters from Hellsing and Castlevania.