Chi Heart

Abilities
Chi is a high level vampire, over five centuries old. This grants them inhuman physical capabilities including extremely enhanced strength, speed, reflexes, stamina, and healing. Few mundane weapons can even properly injure them - holy weapons affect them as normal weapons affect people. In this way, a holy weapon isn't so much a weakness as it is a means to actually inflict proper injury. Other enchanted weapons typically work in the same way.

Being a vampire does come with some weaknesses - sun burns and garlic is repulsive. Chi has no particular weakness to holy symbols, though.

Beyond being a vampire, Chi is also a master of all forms of magic, having devoted their long life towards studying it. There are few forms of magic beyond Chi's general understanding, and their skill has reached the point where most spells are casual things. For example, they often walk through sunlight in a field of enchanted twilight, and they change form frequently enough that nobody (even perhaps Chi) knows their true form (if they even still have one).