Septimus senses a Shadow 

doctorlightnumber-x said: “There’s something…different here…” he said in a quiet, light voice, airy with nervousness as he glanced about.

Max glanced around as well, looking up and… well. He sighed, and quietly shook his head as he saw Shadow up there.

"It’s nothing huge, X. It’s just my brother. One of the Anons summoned him recently. And he isn’t going to scare you, right Shadow?" he gave the other Armor a pointed look.