Pandora in the Crimson Shell: Ghost Urn Vol 12

From the Seven Seas Entertainment edition

FULL HOUSE! Nene and Clarion have a new housemate: Clarion’s mysterious twin, Phobos! While Clarion is still wary of her strange sister, Nene is just happy to have a new friend! Besides, Nene is going to need all the help she can get after accepting a dangerous new job...

Source: Penguin Random House API