She's almost a bit too serious...

She's not serious. She loves fun.

He never makes any jokes…
(well, that's what he said to Private in 'It's About Time')

i so agree with you ladyprivate... well, he does have a nervous break down so...

Totally! Even though he is CRAZED about Candy! XD

It really depends on the situation at hand and the precise definition of "serious" at a given time.

If "serious" were to mean the most disciplined, dedicated, focused, and committed to a particular goal or mission, Skipper is the one for sure. But if "serious" were to instead refer to one who looks at situations with common sense thinking and rationality (and without paranoia), Marlene takes it.

Mayurice can qualify at times, and so can Skipper.

Maurice laughed like TWICE in the series!!!!!

I think it would be julien because he always bosses around every body.

skipper

I completely agree with SJF_P2. The all have their moments, well, maybe not Julien...

Well, I'd have to say Skipper. He takes his role as a commando penguin leader very seriously and isn't the type to slack off on duties. Also, in the episode "Crown Fools", the rest of the team agreed that he wasn't really the fun type. Kowalski and Maurice are close seconds, though.

Even Julien can be serious. He was serious about his music in "Assult and Batteries."

Skipper is pretty serious. He takes things, well, seriously and isn't known to be a very fun person (in my opinion, anyway). Maurice, though, is close.

I'd say Julien is the least serious person. Yes, he can be serious, but all in all, he's much more laidback than someone like Skipper.

Ya know, I change my mind. Really depends.

Marlene is Serious To Me on The show ;)