Head canon (sanders sides)
When one of them is really feeling down the others each try to help by..
Roman: following them around singing disney songs and quoting musicals about how he loves them and promising to “vanquish” what ever is upsetting them and writing a decree that they smile so for the rest of the day he keeps walking up and saying “ITS THE LAW NOW BE HAPPY ” and if that doesn’t work he goes to his room and brings back a crown then makes sure for the rest of the day everyone TREATS THEM LIKE THE PRINCE THEY ARE
Logan: forcing them to sit down on the couch so he can read to them (it is probably some boring statistics about the different types of apples but they know he’s trying and its the thought that counts) and he wont allow them to leave until they confess the problem and he 1. Helps them fix it 2. Tells them that whatever bad things they are thinking about themselves is not true and here’s why
Patton: just lots of hugs, and kisses, and “i love yous”, and drawings of cute things, and he leaves 200 sticky notes everywhere with good things about them, oh and also baking them a cake that says a trademark “fam i.l.y.” for good measures.
Virgil: makes them an angsty playlist with some of his favorite songs and puts them onto a CD, he also probably writes a sappy little low key passive thing on the case like “you aren’t so bad” and on the back in really small black barely noticable letters he puts “its an understood thing”