The past is gone
Isoshi's parents, Yoshio (father) and Miho (mother), who are both already dead - Miho died giving birth to Isoshi, while Yoshio died even earlier during a mission. They're very static here because they're having their photo taken. Isoshi has said photo with him at all times, as well as one of his grandfather.

HOLY SHIT I DID A PROPER BACKGROUND LOOK OUT THE WORLD MIGHT END DDDD:

Detail shots:
[1] [2]