Demonic Genes: From her demonic father, Sarah has enhanced speed, strength, and senses (mostly sight, hearing, and smell). Sarah, had she been born and grew up normally, her natural lifespan still would've been extended. She also has a high resistance to fire.
Life Energy Absorsion: Unlike her sisters and father, Sarah can't devour souls. Instead, Sarah has the ability to devour someone's life force or their life energy. Because of this, Sarah can't gain power from this ability like her sisters can from devouring souls.
Dark Magic User: While not as proficient in it as Marsha, Sarah is still able to perform some magic such as her proficiency in performing seances that allow her to communicate with ghosts in a low level dead world.
Recreated Body: As a result of Sarah being brought to life using dark magic, Sarah is immortal and unaging. In addition, Sarah can rapidly heal and can't be killed unless the spell used to bring her back is broken in some way.
Musical Talent: Sarah is a lovely singer. She is also very proficient in playing piano and violin.
Intelligence: Sarah is intelligent in a number of areas such as plants.
Green Thumb: Sarah is very talented in growing and tending plants.
Demon weaknesses: Because of her demonic father, Sarah is vulnerable to the typical demon weaknesses such as holy water, salt, and holy weaponry. Sarah also hates cold environments. It should be noted, however, that Sarah can still heal from being struck with a holy weapon but the healing process is slower.
Feral Mode: Similar to Marceline, Sarah can enter a "feral mode" when she becomes ravenous out of hunger. This state will only subside if she consumes a sufficient amount of food or souls.