Fort Ichinose... Hajime.

[ He nods slowly to himself. It sounds good to him, utilizing both names and all, and since she's readily agreed with his suggestion of naming it after her, he decides he can spare a little more effort in constructing this pillow fort than usual. ]

Pillow forts don't need to be just pillows, right? If we find some thin blankets to wrap around it, it won't fall apart.