Lux's dark past with SAO 's Laughing Coffin guild has been revealed-along with the bad blood she shares with Gwen, leader of the Batty Bats. When the girls are sent on a quest to eliminate Gwen, will Lux be able to follow through and betray her former friend yet again...? | Sword Art Online: Girls' Ops Vol. 4 by Reki Kawahara, Paperback | Indigo Chapters