That day, when Jerome transformed into the black wolf, the dark force seal within his body cracked, and the black miasma that he once absorbed leaked out of his body.
Xavier and Decker didn't know where Jerome had this black miasma, but they knew now that Jerome had the dark attribute.
They separated the two children's rooms for fear that Jerome's black miasma would injure Lionel. Decker also forbade anyone from coming to Jerome's room because no one knows how dangerous the black miasma that comes out of Jerome is.
Everyone who saw Decker's actions thought Decker openly stated that he treasured Lionel more than Jerome. They assume now that the twins' parents are away, Decker draws a dividing line between his grandchildren.
Only Letti, Xavier, and all the squad members know the truth. Decker did it to protect everyone and protect his grandsons.
