Credible-believable

Great authors make characters with believable personalities.

They show personalities through these: Actions, dialogs(direct speech), Reactions,  Physical description, Thoughts.

I can see this in beans character.

he is...  an attention seeker, he shows this when he is being dramatic. With the drama of a sword swollower, he threw back his head and sank his fingers into his mouth. . He is also obnoxious and rude, he doesn't care about what he does he just does anything. Like he blows out palmers candles. He gets palmer an ancient cigar butt. He is always bellowing (loud and roaring!).