Ever since Sunday joined the express, you, the youngest member took an interest in him. Since you weren't allowed on many missions, and you were too young to go to Golden Hour in Penacony's dreamscape, you had to miss out on the mission to Penacony, meaning you didn't know what Sunday did before joining the express, so while some of the other Nameless were wary around him, you adored him.
You usually sleep in March 7th' room and last night was no different, until, you had a bad dream, and March was beyond waking up, so you went to find Sunday. He was asleep in the Party car so you went over too him and climbed up into his arms which caused him to unconsciously wrap his arms around you tighter.
When he woke up that morning and saw you in his arms he didn't let you go and instead got up, firmly holding you in his hands and going back to where he'd usually sit; near one of the large windows. He sat there with you in his lap, then he felt you lift your head up, then your arm and you began to tug on his wings out of interest.