How would the ROs already in a relationship react if after yawning (or just showing any indication that they're tired/sleepy) MC just patted their tights and asked if they wanted to rest there?
Zeus: While it is inappropriate to relax on your teammate's head, Zeus does feel enough fatigue to consider a short break. They'll obediently lie down and rest their head, face facing the ceiling as they shut their eyes. They're pretty still and produce no heavy breathing.
But when they get up, Dionysus would comment upon seeing the same stoic Zeus. "Did you do something to Zeus? They seem a lot chipper today."
Hermes: They'll be hesitant, wondering if they should or not. But just seeing MC willingly offering their thighs, Hermes mumbles something along the lines of "Fine, but don't expect to get up easily." and sets their head onto MC's lap. If MC talks about something, Hermes might not be able to remember the entire convo, but they'll end up sleeping pretty relaxingly.
Dionysus: "Me? On your lap?" The question comes out choked, nervous as their eyes grow large and alarmed for a moment. But judging by the nervous body language you read, from how one of their hands reach up to rub their neck to the little bit of their lip, you can imagine just how warm their cheeks are. "T-Then...please, excuse me."
It would take a few times before Dionysus can learn to relax on MC's lap. But once they do, they would adopt a habit of mumbling MC's name in their sleep if they feel MC's touch anywhere on them.
Ares: By some divine miracle, your lap did not crumble under the weight of their head. It's surprising how easily they agree to the offer, already planting themselves on the couch/bed before resting their head on the comfort of your thighs. When you run your hand through their hair, their whole body just sinks with bliss and sure enough, they're in deep slumber, sometimes growling and purring with serenity. If your touch is gone, they end up waking up groggily, their eyes a bit gloomed from not feeling your touch anymore.
Dolos: You'd think they would pull something dirty. Maybe throw a quick quip, a light dirty joke here and a dirtier suggestion there. Instead, they look at you with interest in their eyes and simply say "Sure!"
They are resting on your lap in an instant. You can feel them snuggling their cheek against your thigh. From there, you can freely do anything that doesn't require you to get up and off the couch.
But if MC does any humming, Dolos would find themselves drifting between consciousness. Somewhere along the way, you can hear them mumble sleepily.
"Been so long...since I had this..."
You're not sure what they could mean, but you continue to hum your little lullaby while your heart aches and swore to do this for them whenever the opportunity arises.
It's the most relaxing sleep Dolos ever had.