{{Character base infobox|name=Ruby Jagger (née Portia)|background2=#80461B|background1=#80461B|died=p. 2013|blood=Part-human|nationality=Australian|alias=*Mom (by Scarlet Jagger)|species=Werewolf|gender=Female|hair=Red-tinged Dark Brown|eyes=Dark Brown|skin=Light Brown|family=*Red Jagger (husband)
- Scarlet Jagger (daughter)|romances=*Red Jagger (husband)|patronus=Wolf|loyalty=*Lupin Pack
- Clan of Portia
- Howlington Academy
- Jagger family|
Ruby Jagger (née Portia) was a Latina-Australian part-human witch and pure-blood werewolf and a graduate of Howlington Academy. While at Howlington, Ruby was a close friend of both Flasheart Lupin and the half-monster Edward "Eddy" Hyde, but when the latter was discovered to be the son of a monster and Muggle, Ruby did not oppose the motion due to the general attitude of disparagement that pure werewolves and other 'monster' beings typically regarded the non-magical population and would later be remembered as one that had a true monster heart. In addition, Ruby was friends with many individuals who would later become the wealthy patrons of her school, but her heart would lead her to casting aside her previous values when she met and fell in love with Red Jagger, a Muggle monster researcher.
Despite the antagonism most pure werewolves felt towards the non-magical people, Ruby developed a mutual attraction with Red developed by his kind and gentle nature. One of the most powerful werewolves of her generation, Ruby Jagger was resistant to the full moon with the aid of her moon band and could transform from human into a werewolf that retained her sentiency at will, thus allowing her to move to the non-magical world, where she married Red, who she also showed the entrance to Howlington on one occasion. The couple eventually gained a young half-human, half-werewolf daughter they named Scarlet, who Ruby bestowed her moon band on before she died from unspecified circumstances.