Death Incarnate is very soft on the inside despite the serious air he gives off.

Should Kumoko try to reach for Mort, she'll find him losing his shape, becoming a bunch of lifeless plushie parts. Fabric, fluff, string, just pieces.

The chance is instant, but Thanatos doesn't seem too concerned. He'll reach for Mort who will reform just as quickly as he had fallen apart. Mort squeaks amused.