Personal Info:
Real Name: Summer Day
Also Known As:
Place Of Birth: Unknown
First Appearance: Firestorm Vol.1 4
Known Associates:
Group Affiliation: Injustice League Unlimited, The Society
Base Of Operations: Mobile
Grudges: Firestorm
Enhanced Abilities: Hyena has enhanced strength, agility and endurance.
Teeth: Hyena has razor sharp teeth, which he can use to bite a victim.
Claws: Hyena has a set of razor sharp claws.
Leaping: Hyena is able to leap great distances.
Summer Day was the older sister of Ronnie Raymond's girlfriend, Doreen Day. Summer's father was a police officer who resented Summer because he wanted a son instead of a daughter. Over the years, Summer tried everything she could to live up to her father's expectations, including joining the police academy, but nothing she did pleased him. When she failed at becoming a police cadet, he refused to speak to her. This was the final straw for Summer, and she developed an immense hatred for her father and all policemen. In an attempt to get away from her troubles at home, she joined the Peace Corps. One night in Africa, she found a native wounded by an arrow. When she called for help, he turned around and bit her face, causing her to pass out. She later discovered that the native had turned into a were-hyena and would have killed her if one of the Corpsmen hadn't shot the creature. Sometime later, after having an argument with her father on the night of the full moon, Summer first changed into The Hyena.