Rasmus does not project the persona of someone you'd want to have a beer with, like Tuch does. Tuch as an upstater "one of us" and is more familiar in his mannerisms and such.
I think Dalihn simply isn't naturally charismatic and doesn't try. That says nothing about how he relates with his fellow players in the room.
I'm kind of working through this for myself: When I think of a captain I think of a charismatic guy, a guy who exudes positive vibes and an upbeat nature. But those aren't qualities of a captain, they're qualities of a PR person. Often the two line up but I don't think it's necessary that they do. Maybe it's best that the captain is a reserved, nose-to-the-grindstone type of guy. The happy happy feel good coach is gone; we have a more intense, more serious coach and it makes sense to have a more serious captain.
In short, being captain is not about the fans, it's about the team.