Human-looking silhouette/Relationships

Lyza
Lyza describes in her notes an encounter with a Human-looking silhouette somewhere near the 7th layer. While the silhouette was watching Lyza, she took notice as well and kept an eye on them. When Lyza tried to call out to them, they escaped jumping.

Reg
During the battle in Ido Front with Bondrewd, Reg wakes up after overcharging and claims to have been controlled by someone among many people who come to his mind, among them the Human-looking silhouette appears implying there may be a connection between them. The silhouette also appears before him in his overcharged state while looking at Bondrewd causing him to get enraged.