Vessel is Yukisada’s assignment, not a second innate name. He regenerates past decapitation. He sits in the headquarters barrier so he can split it from inside. Yura calls him the strongest fighter among the ten. Hakuri’s Storehouse is the tool that works: remove the Kamunabi vessel from the split. Chapter 97 is titled Vessel.
You do not stab a wall that is also a person
The barriers page already wrote that sentence. This room is the technique index row with a door. After the massacre, Azami cannot call Shiba into the building until Yukisada’s stolen barrier is a field again. Official chapters: VIZ / MANGA Plus.
File: chapter 97, Yukisada, barriers.