I very much like the New Life forms for Cleos, but the one Hera just feels extremely out of place. It barely even looks like her at all.
The snake is the symbol of medicine dating back to ancient greece. You may have seen the Caduceus staff which is sometimes drawn as two snakes coiling around a winged staff, and occasionally one snake with a head on each end coiled in the same manner in other depictions. Its a worldwide well known symbol. There are similar symbols in chemistry, and the Ouroboros, the serpent devouring itself from the tail forward, is commonly referenced in various philosophical practices, including alchemy.
I don't claim to have insight into the developer's thoughts, but it seems likely to me that it is related here.