The Soldier may have slightly unrealistic expectations about their own ability to do just that. Or at least, in their ability to corral the ones using the Invincible as their home base. The ones outside their purview don't get the same assurances.

Except Misty, of course.

"Contact. Spirit. This high--" They hold their hand up almost as tall as they are. "--head and hands like an owl, dusty suit. Likes coffee and being scratched under the feathers on the back of their head and. Me, apparently." The Soldier shrugs, a little awkwardly. "They answer questions and give me warnings. But I can't find them, now." It might be inferred from the Soldier's faint expression and tone that they're worried about this particular spirit.