A fun thing to do is make some armory costumes that look like your Alts, so then you have what seems to be the dressing room for your own little Justice League
Or have my henchmen/sidekick hanging around......or have my alts as my henchmen or sidekick AND have them haging around in my base ^^.
I guess, but I still would like to see them walking around, interacting with the amenities, dueling each other (that would be epic)
I don't understand why the devs ignore these kinds of topics... Some time ago I gave the idea to create a new trinket. This trinket might be called "partner" or something like that. The idea was you with your char, call an alt to help you, something like the accomplice trinket. If wanna to change the alt appearance you just need log in with him and change your style without many difficulties. The level of force it could be the same accomplice level. This trinket can have special abilities like the alt is healer, he will heal you. If he's troll, he will give you power. If he's tank, will tanking the enemies. Anyway, it's a very good idea that the devs could put in the game. I would love to see my 2 chars side by side, one helping the other. As for your idea, it would be very good too. I hope the devs at least read these ideas...