Skarmory tend to be very stoic, they only bond with those that manage to impress them in battle, which is hard to do since they're very adept at combat, still seeing them with human partners is not entirely unusual!
Delibird are known to be quirky, so if you want to bond with one it's best to embrace a sense of generosity and whimsy because they have a habit of handing people they like the WEIRDEST things for no reason!