Alucard (hellsing abridged)

Shapechanger. If Alucard isn’t in running water or sunlight, he can use his action to polymorph into a Tiny bat, or a Medium cloud of mist, or back into his true form.

While in bat form, Alucard can’t speak. In bat form, his walking speed is 5 feet, and he has a flying speed of 30 feet. Anything he is wearing transforms with him, but nothing he is carrying does. He reverts to his true form if he dies.

While in mist form, Alucard can’t take any actions, speak, or manipulate objects. He is weightless, has a flying speed of 20 feet, can hover, and can enter a hostile creature’s space and stop there. In addition, if air can pass through a space, the mist can do so without squeezing, and he can’t pass through water. He has advantage on Strength, Dexterity, and Constitution saving throws, and he is immune to all nonmagical damage, except the damage he takes from sunlight.

Magics of the consumed souls: over the years Alucard has taken many souls into his possession some of which were powerful casters and with that he may tap into their weave using some of the powers they still have. Each can be cast 5 times per day. Misty Step, Fog Cloud, Mage Armor

Big Tiddy Guard Girl. A thrall to the undead lord she serves his whims however ridiculous and absurd they may be. once per turn Alucard may issue one of the following commands. 
Cover fire. Impose disadvantage on target creatures attacks 60ft from alucard till the end of his next turn.
Kill shot. pick a target that is wounded roll with advantage 1d20+10 to hit with Large Arcane Riffle range 30/90 ft., one target. Hit: 10 (1d12 + 4); Critical hit on 18-20.
Blood Bag Stat. Alucard is tossed a bag of blood allowing healing of 2d6 instantly.

Legendary Resistance (3/Day). If Alucard fails a saving throw, he can choose to succeed instead.

Regeneration. Alucard regains 20 hit points at the start of his turn if he has at least 1 hit point and isn’t in running water or sunlight. If he takes radiant damage or damage from holy water, this trait doesn’t function at the start of his next turn.

 Spider Climb. Alucard can climb difficult surfaces, including upside down on ceilings, without having to make an ability check.

Vampire Weaknesses. Alucard has the following flaws:

Forbiddance. He can’t enter a residence without an invitation from one of the occupants.

Harmed by Running Water. He takes 20 acid damage if he ends his turn in running water.

Stake to the Heart. If a piercing weapon made of wood is driven into his heart while he is incapacitated in his coffin, he is paralyzed until the stake is removed.

Sunlight Hypersensitivity. While in sunlight, Alucard takes 20 radiant damage at the start of his turn, and he has disadvantage on attack rolls and ability checks.

Multiattack (Vampire Form Only). Alucard makes two attacks, only one of which can be a bite attack.

Unholy Pistol. Ranged Weapon Attack: +9 to hit, range 30/90 ft., one target. Hit: 9 (1d10 + 4) piercing damage plus 11 (2d10) poison damage.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one willing creature, or a creature that is grappled by Strahd, incapacitated, or restrained. Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and Strahd regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if its hit point maximum is reduced to 0. A humanoid slain in this way and then buried in the ground rises the following night as a vampire spawn under Strahd’s control.

Charm. Alucard targets one humanoid he can see within 30 feet of him. If the target can see Alucard, the target must succeed on a DC 17 Wisdom saving throw against this magic or be charmed. The charmed target regards Alucard as a trusted friend to be heeded and protected. The target isn’t under Alucard's control, but it takes Alucard's requests and actions in the most favorable way and lets Alucard bite it.

Each time Alucard or his companions do anything harmful to the target, it can repeat the saving throw, ending the effect on itself on a success. Otherwise, the effect lasts 24 hours or until Alucard is destroyed, is on a different plane of existence than the target, or takes a bonus action to end the effect.

Alucard can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Alucard regains spent legendary actions at the start of his turn.

Move. Alucard moves up to his speed without provoking opportunity attacks.

Unholy Pistol. Alucard makes one Unholy Pistol attack.

Bite (Costs 2 Actions). Alucard makes one bite attack.