Amaya came back to Tsukasa after finding more lone wolves that didn't have packs of their our Tsukasa always welcomed her back when she turned to him.
Tsukasa got a new member to the group his name was Gen Amaya knew him from school and knew, he couldn't be trusted he knew Senku, Amaya tired to warn Tsukasa.
Tsukasa believed her and had her keep the wolves to keep an eye on him without home realizing it.
Amaya was waiting with Tsukasa has Tsukasa told Gen to go to a nearby village that's a few miles from them.
Gen went to fine more people to join Tsukasa and Amaya's group he got to the village and ends up helping Senku out.
Gen was unaware of six wolves were watching his everything he does, they saw Senku alive and hasthe village on his side they looked at each other then went back to give their report to Amaya.
"I knew it" Amaya said and goes to tell Tsukasa about Senku and Gen betrayal with Gen.