"Hawwa" (in this card's Japanese name) is based on the stars of Ophiuchus, which contains Ras Alhague. In medieval Islamic astronomy (Azophi's Uranometry, 10th century), the constellation was known as Al-Ḥawwaʾ "the snake-charmer".
Due to this monster being based on Ophiuchus, which is symbolized by a man carrying a snake, it is holding a staff that looks like it has been bound with a snake, similar to the Rod of Asclepius.
A symbol commonly associated with Ophiuchus is the Caduceus, which is a staff with two snakes wrapped around it.
The symbol of Ophiuchus, ⛎, can be seen at the back of this monster. Ophiuchus has sometimes been used in sidereal astrology as a thirteenth sign in addition to the twelve signs of the tropical Zodiac.
According to the Duel Terminal storyline in the Duel Terminal Master Guide 2013, "Constellar Rasalhague" used the power of the "Gishki Aquamirror" to fuse itself with the 3 corrupted "Ice Barrier" dragons to become "Evilswarm Kerykeion" in order to defeat "Sophia, Goddess of Rebirth" together with "Constellar Sombre", which means that it is not a true "Lswarm" monster, and is also not completely corrupted per se, as compared to the other Duel Terminal monsters infected by the virus of "Lswarm", and thus explaining the "Constellar" symbol that can be seen on the Aquamirror staff that "Evilswarm Kerykeion" is holding.