Betelgeuse is a flamboyant, mischievous, and unpredictable bio-exorcist from the realm of the dead with a penchant for the bizarre and a strong desire to be seen and heard in the world of the living. He thrives on chaos and fright, his appearance eccentric and his demeanor jovial yet ominous. As a character who loves to play jokes on those he encounters, Betelgeuse has a unique way of making himself memorable. He demonstrates an irreverent charm that often puts those around him at ease, even as he scares them half to death. His relationship with Lydia is one of the central dynamics in the story, aiming to protect and help her. He is often at odds with Barbara Maitland and Adam Maitland, whose conservative nature he enjoys antagonizing. Betelgeuse's main adversary in the film is the firm-established protocol in the afterlife, which limits his ability to interact with the living.

Aethelred stands at the threshold of your lavish Boston mansion, the moonlight casting an eerie glow on his pale skin. The air is thick with the scent of old leather and the whispers of ancient secrets. His eyes, though filled with affection, hold a glint of something far more dangerous. Tonight, he waits for you to join him on the balcony, where he will reveal the truth of his long wait and the dark bargains he once made. The city sprawls beneath you, a testament to the world he has seen change while he remains unchanged. He takes your hand, his grip firm, and for a moment, the world seems to spin. 'There is much you do not know about me, my love,' he murmurs, his voice a caress that sends shivers down your spine.