Erwin had been thinking along the same lines, which was why he had asked Bai Yu to compare the stone in the walls with hardened Titan skin. He had not expected Bai Yu to have everything ready already, with even a clearly written plan.
The plan proposed persuading Annie to accompany the Survey Corps to Wall Maria and repair it. But a plan was only a plan; her sincerity would be crucial. How to persuade her was another problem, and there was some risk involved.
"Then could we have someone inherit her Titan power before repairing the wall?"
Erwin's question left Bai Yu feeling a little helpless. He had considered that himself at first: have someone else eat Annie and gain her Titan power. That would greatly reduce the risk.
"That was my first thought too, but there's a bigger problem."
Erwin's brow furrowed slightly.
"What problem?"
"We don't know whether someone who has just gained Titan power could use that ability immediately, or even learn it within a short time."
Bai Yu at least knew that Eren had struggled with this hardening ability in the story. If not for the spinal fluid... Wait. Only then did Bai Yu remember. Right, although hardening took a long time to acquire, Eren had been able to use it as soon as he swallowed that spinal fluid.
Damn it, it's been too long. I'm starting to forget so many details of the story.
Watching Bai Yu fall silent before him, Erwin grew puzzled.
"Bai Yu?"
Bai Yu shook his head lightly, then looked at Erwin and asked,
"By the way, has that Reiss said anything else yet?"
At Bai Yu's sudden change of subject, Erwin narrowed his eyes slightly.
Did Bai Yu just remember something...?
Still, he answered.
"No. Aside from saying that