Regeneration. Althea regenerates 15 hp at the start of her turn as long as she isn't in sunlight or running water and hasn't been damaged by holy water.   Vampiric Weaknesses. Althea has the following flaws
Forbiddance. Althea can't enter a residence without an invitation from one of the occupants.
Sunlight Sensitivity. Althea takes 2d6 + 6 radiant damage when she starts her turn in sunlight.
Harm by Water. Althea takes 2d6 + 6 acid damage when she ends her turn submerged in running water. Running water has to be where water is naturally going from one place to another like a river or stream. In addition, she is vulnerable to damage by holy water.
Garlic Intolerance. Althea takes 2d6 + 6 poison damage if she injests a clove's worth of garlic. She is also unable to breathe when there is strong garlic near her though that is at the DM's discretion.
Stake to the Heart. Whilst she is incapacitated, if a piercing weapon made of wood if driven through her heart, she is reduced to 0 hp, disappears into mist and returns to her resting place. If the wooden stake is driven through her whilst she's at her resting place, she dies.   Misty Escape. When Althea is reduced to 0 hp or below, she vanishes into mist and returns to her resting place. In her resting place, after half an hour, she can rise awake with 15 hp, or rest for longer gaining an increasing rate of hp each half hour by 5.   Shadow Subversion. Due to her vampiric nature, Althea doesn't cast shadows (in a normal way at least) or have reflections in mirrors. An investigation or perception check might reveal these details, particularly if there are mirrors around.   Eyes Everywhere. Althea can see through any paintings or statues in her house that have eyes. In addition, she can also see through the eyes of any bats in her house. Whilst Althea is seeing through other eyes, her own eyes go bleached white and she cannot see from her eyes.   Spider Climb. Althea doesn't need to make checks to climb difficult surfaces and can climb upside down.