Headcanon:
Roman is able to pick all of the other sides up bridal style, and they all have their own unique reactions.Logan gets embarrassed and says, weirdly calm: "Roman, put me down."
Patton starts smiling and blushing like an idiot.
Virgil starts blushing too, but gets angry and orders Roman to put him down.
The darksides:
Deciet gets embarrassed and says something like: "This is totally normal."
Remus doesn't say anything and acts like it's a daily activity. Like, well it's time for my brother to pick me up.