"Ren understands the range interruption role," Sera said.

"I worked with him this afternoon on the elevation positioning and the sightline arcs from the corner platforms." She paused. "He’s good. Very controlled. He doesn’t rush the shot."

"Good," Michael said.

"The rope configuration Gareth proposed for the corner platform safety line," she said.

"It works. I had Damon test it with full movement load this afternoon. Holds." She looked at the notes. "I added a secondary anchor point to his design. It’s better now."

He looked at her. She had taken Gareth’s design and improved it without making anything of the fact that it had been Gareth’s design.

That was Sera being practical in the specific way that made everything around her function better.

"The full training integration is in place," she said.

"Tomorrow’s session adds the Rens elevation role to the ground team drill so everyone understands what the range interruption looks like from the ground and how to use the window it creates." She paused.

"Yuna is going to run the left side session again. She’s good at the teaching. Different approach to mine but effective."

"I noticed," he said.

Sera looked at her notes. "The inside reach principle for the variant profile," she said. "I’ve been thinking about whether there’s a modification that works for people who are less naturally suited to the committed inside move." She paused.

"Most of the building’s population can do it after training but there are two or three people where the reflex pattern works against the commitment timing." She looked at him. "Gareth’s man. Fetch. He’s fast and strong but his reflex on approach is to widen rather than commit inward. I’ve been working with him on it but the reflex is deep."

"Alternative approach," Michael said.

"Lateral displacement rather than inside move," she said.

"Same principle, different geometry. You don’t go in, you go sideways at the last moment and let the variant’s momentum carry it past you and take the contact on the recovery." She paused.

"Slower window to exploit than the inside move but more compatible with his natural reflex pattern."

"Does it work," he said.

"I ran it six times with him this afternoon," she said. "By the sixth he was getting the timing right consistently." She made a note on the paper. "I’ll integrate it as the secondary option tomorrow."

He looked at her and thought about Sera spending the afternoon working on a modified contact approach specifically for one person’s reflex pattern and thought that this was what Sera’s version of caring about the people in the building looked like.

It was not the warm obvious kind, just the version that showed up in six repetitions of a drill until the timing was right.

"The shoulder," she said without looking up from the notes.

"Better today," he said. "Dr. Kang’s two day protocol."

"You used it this morning on the blast wall placements," she said. 𝒇𝙧𝙚𝓮𝔀𝓮𝒃𝙣𝓸𝒗𝒆𝒍.𝙘𝒐𝒎

"Light use," he said.

She looked at him over the notes with the look that said she had an opinion about light use and had decided not to spend the energy stating it tonight.

"Tomorrow," she said. "Blueprint work only. Cole’s group handles the materials."

"The underground expansion shaft—"

"Cole’s group," she said.

He looked at her.

She looked back.

"Blueprint work," he said.

"Good," she said and went back to the notes.

They sat in the quiet of ten o’clock with the building settled around them and the pulse running its sweep and the build queue lined up for tomorrow and the day after and the day after that, each layer going in, the picture getting cleaner, the building getting closer to what it needed to be.

"Sera," he said.

"Yeah," she said.

"The defense picture," he said. "How do you feel about it."

She was quiet for a moment with her eyes on the notes. "Better than a week ago," she said. "The turrets change the exterior engagement significantly. The blast walls add the interior layer we needed." She paused. "If the underground expansion goes in on schedule the building has a viable fallback for every scenario I can model." She looked at the notes. "I can model a lot of scenarios."

"And," he said. Because there was an and.

She looked at him. "The variants are the part I can’t fully model yet," she said.

"We don’t know their numbers in the north. We don’t know if they’re coordinating with the Aberrant group or operating independently. We don’t know if the virus has produced additional variants we haven’t seen yet." She paused.

"The known threats I’m comfortable with. The unknown threats are the ones that require the underground expansion to be done before we need it."

"It starts tomorrow," he said.

"Good," she said.

She folded the notes and put them in her pocket and looked at him for a moment with the expression that had been evolving for thirty seven days into something that still didn’t have a name attached to it and then she got up.

"Sleep," she said.

"I will," he said.

She went to her room and he sat on the floor and looked at the build queue and the pulse and the timeline and felt the particular focused clarity of someone who knew what was coming and had a plan for it and trusted the plan.

He pulled up the underground expansion blueprint.

He started building it in his head before he bought the first material, walking through the chamber dimensions and the air circulation routing and the supply integration and the communication link, making sure the sequence was right before committing to it because the underground expansion was the final layer and final layers needed to be right the first time.

He was satisfied with the sequence at eleven thirty.

He bought the first materials at eleven thirty one and felt them arrive in the northeast ground floor corner and closed his eyes and listened to the building around him and thought that tomorrow they went underground and that was the right next thing.

He was asleep by midnight for the first time in four days before midnight.

That was also the right next thing.

---

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