Two sisters with alien symbiotes that provide them with a range of abilities. Both were members of different versions of The Elite, with the second, Sonja, also being a member of the Justice League Elite.
Pam was the first Menagerie, and then after her defeat, Sonja took up her sister's mantle.
Major Story Arcs
Justice League Elite
Sonja joins the Justice League Elite. While trying to infiltrate the The Blood Brothers, Sonja uses her bugs to listen to and track Deathstroke, who is really Vera Black in disguise. Then later in the presence of the Lars and Tomas Blood, Sonja fights with the rest for a spot on the Blood Brother's team. Sonja appears to be shot by Deathstroke, but again it is ruse to get Vera onto the Blood Brother's team.
Later while on a recon mission with Coldcast Sonja explains that she is on the team to hurt bad men because it "feels funny inside to hurt other bad men. This leads to Coldcast and Sonja hitting it off and later having sex.
Later on a mission to catch Sundeath, Sonja uses her acid blood to melt off the hand of Lars Blood. Then later when the team is wrapping up everything President Baht is killed but no one seems to know how or who did it.
Later back in the stated Sonja goes to see her sister Pam, who is in a coma due to Manchester Black.
Sonja uses her creatures to produce a toxin much like Aftermath's new street drug, so that half the JLE can go undercover into his gang. Sonja is then part of the team that goes into space to rescue the undercover team. During this mission Sonja seem to get jealous of Coldcast and Kasumi's relationship. Then when Manchester Black releases the Worlogog, Sonja disappears.
Eve of Destruction
During Kasumi's investigation into President Baht's death, she learns that Coldcast is framed and it was Sonja's creatures that mind controlled him into committing the murder.
Vera black then finds Sonja on a beach. There Sonja admits to destroying the team because she still blames Vera for what Manchester did to her sister, Pam. The JLE then uses there collective powers to capture Sonja.
Sonja is taken to the Justice League watchtower where she is separated from her creatures. It is like a heroin addict on withdrawal times infinity plus one, according to Green Arrow. Their intent is for her to be tried for killing Baht.
In Other Media
The original Menagerie appeared in the animated film Superman vs. The Elite.