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Penance, Penny, Yvette, Hollow
Place of Birth
(as Monet St. Croix stuck in the Penance body) Generation X #1 (1994), (as St. Croix twins in Penance) Generation X #40 (1998), (as third, unnamed entity in Penance) Generation X #57 (1999), (as Hollow, which may or may not be the same entity) Loners #2 (2007)
Generation X #40 (1998)