This card's name is a reference to the Unukalhai, the brightest star in the constellation of Serpens, with an apparent magnitude of 2.63. This card's relation to "Shaddoll Squamata" could allude to this fact.
The Serpens Caput portion of the constellation Serpens appears in the artwork of this card, with Unukalhai's location in said constellation denoted by an encircled star.
This card and "Satellarknight Sirius" are the only "tellarknight" monsters to feature shadows in their card artwork. This is most likely reflective of the fact that both monsters have "Shaddoll" counterparts.