Q-Jei

It could be highly possible that Sirius was in Devon Corp during the raid organized by Ame since it's been stipulated in Labradorra that he was the one who tore out the eye of Solaris (or Taka if you chose the Zekrom Route). That makes me wonder if what happened to Arclight could be Sirius' doing too. After all, he suffered the same fate himself as a response from Corey when he killed his wife in the past, so Sirius could well have reproduced this same practice on his new victims, Arclight included.