In her short life, Hydra has shown a proclivity toward violence alongside her twins, exhibiting a ruthless response to those who transgress against she and hers. One such incident earned her a notch on her ear, and so as to avoid being different from one another her sisters make the decision to remain completely identical, a pact that they will keep to their entire lives. Another incident causes Hydra to participate in taking out Blackfeather Woods alongside her sisters, a thing that is largely selfishly motivated by her own desire to be permanently rid of Vaati, who made an enemy of her when he attacked one of her friends, Rannoch, without cause.

Over the course of that same year, Hydra faces a betrayal from the very same man she had saved, but also one of her closest friends, who follows him, Terance. It causes the heart of Hydra to harden, and her sense of trust in others who are not her family to reduce significantly. Hydra deigns to only interact with her family and pack. Later on within her second year, Hydra undergoes her first heat and finds a mate in Dirge. Breeding season causes chaos when her mother does not come into heat, but another unrelated female, Speedy, does; Hydra is prevented from stopping her heat by her father, who takes her away to protect her. That protection comes at a great cost, causing a rift within the tight-knit Ostrega clan. It is eventually revealed that Charon did breed with the other woman, and also revealed are his dreams which echo Hydra's own fresh ambitions (albeit with some significant differences); however, ultimately, his desire to keep them was the end of both Amekaze and Charon. The end of this era sees the beginning of a new one with Hydra as Queen.

Just before her third year, Hydra gives birth to four cubs: Antares, Atlas, Osiris, and Vega. She and her sisters act as their mothers, Hydra ever the head.