I got it now,
It's Gyukimaru/ Onumaru.
The person behind this silhouette is Hiyori. The last time we saw her was in Ringo. So it makes sense that Gyukimaro came with her to Onigashima. I also believe that Hiyori healed the scabbards and then decided to hide because she doesn't want to reunite with them until the raid succeeds. I believe that Hiyori was probably the one who told Onimamru to transform into Oden.
She wants to encourage them and boost their self-esteem to continue fighting and never give up. Especially considering that Jack is on his way to kill them.
It's Gyukimaru/ Onumaru.
The person behind this silhouette is Hiyori. The last time we saw her was in Ringo. So it makes sense that Gyukimaro came with her to Onigashima. I also believe that Hiyori healed the scabbards and then decided to hide because she doesn't want to reunite with them until the raid succeeds. I believe that Hiyori was probably the one who told Onimamru to transform into Oden.
She wants to encourage them and boost their self-esteem to continue fighting and never give up. Especially considering that Jack is on his way to kill them.