Disclaimer: I own neither PJO/HOO or HDM. PJO/HOO belongs to Rick Riordan and HDM belongs to Philip Pullman.
Jason
Prima
Jason had addressed the Roman army with an eagle perched on his shoulder, and an eagle Prima had stayed through the fight, encouraging the legion to fight on. It was later, as Jason had sat in a cloud of monster dust, covered in golden ichor, that she had finally landed, and transformed into the shape of a lioness. She pressed against his side.
"Well done," she had said softly, licking his cheek with her rough tongue. Jason sighed and scratched her behind the ears, not realising yet that this was it.
Prima is a lioness