Everyone's best friend, Scooby Doo famously loves to eat and hates things that go bump in the night. Food is definitely Scooby's weak spot, and he can easily be coaxed into scary situations with a tasty Scooby Snack or two. Unlike most dogs, Scooby can talk.
Shaggy is a laid-back guy. He's a lot like Scooby - the two of them always sniff out the food wherever they go before getting down to business. He never really wants to be a part of solving mysteries, but he always works up the courage to help his friends out.
Fred usually leads the group in solving mysteries and often orders the gang to split up to search for clues. Fred usually takes Daphne and Velma with him, while Shaggy and Scooby-Doo go off by themselves (often in search of food instead of clues).
Daphne is the most likely of the group to get captured, and is usually rescued by one or all of the gang. She's always very curious and brave when the gang come across a mystery to solve.
Velma is the youngest member of the group. She's also the cleverest and will always spot the clues before anyone else... but often loses her glasses, and can't see anything or solve any mysteries without them.