John: When learning upon your death, he is hysterical. John isn't a very emotional person, but he just can't control himself when something happens to you. He can't live without you, he might try to end his own life.
Paul: Could never move on, he wouldn't even try. He'd keep the thought of you with him wherever he goes. He'd never think of remarriage or dating.
George: George doesn't realize the word "dead" means he'll never be able to see you again unless you're in a casket, at first. And tries to deny the fact you've passed. At the funeral, he's crying as he talks to you and touches your hair.
Ringo: Just like Paul, he could never move on. He's hysterical when he finds out the truth, and falls into depression for months on end. He doesn't want to realize you won't come back.
