How they Compare: Biara

Biara is the main succubus general of The Demon Sovereign in the land of Ashan, as well as infiltrator and assassin. She is sent by the Sovereign to infiltrate and sow chaos and discord throughout Ashan and allow the demon-worshippers to get a greater foothold in the world.

Biara's first line of defense is her ability to disguise herself body and voice as any person she desires which she uses to infiltrate mortal empires.

Beyond that she has a number of powers native to her demonic race. Like all powerful Demons she has the power of "gating", able to summon other, usually weaker or lower ranking demons from the Hell of Sheogh to serve her. Biara has noted skill in this area. Even Pit Fiends and Devils powerful enough to contend with Dragons made of Magma and Storm Titans able to create micro-thunderstorms serve Biara, strongly suggesting her raw power is in the City Block Range at least, though she lacks defensive showings. Like all powerful demons she is capable of teleporting at will between Sheogh and the Mortal World as well as between places in the Mortal World as well.

Like all Succubus Biara has the capacity to shoot a blast of fire at her enemies, able to chain and hit each of her enemies within range. Her fireblast range is large enough to encompass a large building or a city block.

She also should scale to powerful Inferno Units like Nightmare and Hell Stallion which can move at the same subsonic speed as the Wind Elementals.

In addition to all this, Biara is heavily knowledgeable in seduction and magic, which seem to be related for Succubus. She has solid knowledge of elemental chains and can utilize elemental weaknesses. 

She possess fire manipulation beyond her fire blasts able to magically call a wall of fire to appear where she wills. She also possess magical earth manipulation including shaking the ground and calling down a meteor shower. 

Beyond that, Biara has the ability to absorb energy and mana to feed her powers. 

So how would she do in other verses?

In the DC Universe, Biara would classify around the power of a demon grunt, having higher attack power and versatility but lower defenses and speed. she would likely if incarnating on Earth be a moderate threat on a local level most powerful metahumans would be able to beat her handily. That said if her gate allows DC-verse Demons to be summoned she would quickly become a global threat. 

Biara would be similarly unsuccessful in the Marvel Universe, as her powers would only make her a mid level street tier fighter. Her infiltration abilities may actually serve her better in Marvel then DC since heavily enhanced senses to be able to notice the difference seems somewhat rarer in Marvel then DC but any mind-reader or super-genius would likely be able to figure out her scheme. Also if her gate allows her to summon Marvel Demons, she would quickly become a global threat.

In the Berserk universe Biara would be very powerful, much more then most monsters, and her versatility and indirect method would allow her to be more dangerous then some "divine" entities like the Sea God. That said any Apostle or powerful Demon Hunter like Guts would destroy Biara if they are aware of who she is. 

In the Dungeons and Dragons universe Biara would be well below Epic Threats but would be an upper level threat. She would be comparable to a Young Dragon having higher raw firepower and better mobility but only comparable versatility and worse durability. She would be an immediate threat to almost any part of the mortal plane but would most likely be slain by a heavily powerful magic-user able to counter her teleportation and blast her.

Biara would fit very well into the Doom verse, having firepower just on par with the verse's strongest members but being a glass cannon and having speed basically on par with most of the verse, though slower reflexes and attack speed. Her special abilities would give her an added boost of versatility to make her heavily dangerous and she would likely be a notable boss that would be hard for Doomguy to beat.

In the Dresden Files-verse, Biara would be in an interesting scenario. She has the firepower to match the verse's strongest earthbound characters is more faster and more mobile then them, however they are often much more versatile and can put up actual shields. She would be an extremely dangerous threat however, especially if she used subterfuge to attack when they didn't expect it. That said any of the verse's cosmic powers would eradicate her.

In the Devil May Cry verse, Biara would likely die quickly in any direct assault due to her low speed and defenses though if she can get a surprise attack in with her stealth she can one-shot a lot of low to mid tier demon bosses. That said she would need to attack them early in their timeline to be able to do any kind of significant damage to people like Dante.