Spoky Lover here

like how Antasma's origin starts; "As told by a Master Pi'illo in west Somnom Woods, at one point, many years ago, Antasma was a normal bat living on Pi'illo Island. However, he once fed on the nightmares of a Pi'illo, and continued to feed on nightmares afterward, slowly turning him into his current self." she was raised by the Zeekeeper. as a cygnet, she swam in dreams and slowly became her current self as she grew up protecting pi'illos and made herself ruler of the dreams despite being beautiful, she is capable of kicking antasma's batty ass like an actual swan's behavior! her eyes are almost always closed due to "her eyes aren't meant to be seen by waking mortals" and in return of her protection, Dreambert protects her unless she chooses final resort.

bonus when Syntasia and Antasma cross paths