You said headcanons, sooo

Geto slips into Nanami's room after the roughest missions, once the immediate aftermath has been dealt with - blood and sweat washed away, bile spat into the sink until his throat is raw and his voice crackling. Most of the time, all Geto does is lay with Nanami's (alive, warm) body in his arms, and Nanami pulls those arms tighter around himself, whispering softly about friviolities - video games, Gojo's bullshit taste in sweets, the sound of the wind through the naked trees ...