Main •
Bella (operated by
John Hasler,
Tamsin Heatley, Emma Quintin, Esther Collins; voiced by Sally Preisig 1999–2000, Emma Weaver 2000–2002) – A five-year-old blue-skinned girl with blonde hair and a red hair bow. As the oldest and tallest of the Tweenies, Bella has a sense of superiority over her younger friends. She projects a bossy and boisterous attitude and likes to take the role of leadership in the Tweenies' games. Sometimes, she causes things to go wrong with her arrogance – for instance, in the episode 'It Wasn't Me', Bella accidentally breaks one of the strings from Max's marionette puppet despite everyone having been told not to play with it as it was "special", and she hides it in Doodles' bed and tries to blame him. Despite this, she always apologises for her wrongdoings eventually. Although Bella comes across as domineering, she has a caring heart and likes to help the younger Tweenies. She loves acting, dressing up, fairies and reading. Her favourite colour is red. Her best friend is Fizz. •
Milo (operated by C.H. Beck 1999–2000, Matthew Lyons/Kate Ryan 2000–2002; voiced by
Bob Golding) – A four-year-old purple-skinned boy with black hair. The loudmouth of the Tweenies, he is energetic and loves telling jokes and playing pranks. Sometimes his impulsiveness and hyperactivity may result in him upsetting the other Tweenies, but he is ultimately friendly and good-hearted. He is quick to argue with Bella due to their loud, clashing personalities. He often adds the suffix "-a-rooney" to words. He loves football and magic. His favourite colour is blue. His best friend is Jake. •
Fizz (operated by
Jenny Hutchinson 1999–2000, Angela Reynolds 2000, Francesca Anderson 2001–2002; voiced by Colleen Daley) – A four-year-old yellow-skinned girl with reddish brown beaded hair. She is usually mild-mannered and laidback but can become stroppy when she doesn't get her way. Fizz is somewhat introverted; when something upsets her, she often retreats to the playhouse for peace. She loves dancing (especially ballet), painting, singing and playing with dolls. Her favourite colour is pink. Her best friend is Bella. •
Jake (operated by Samantha Dodd 1999–2002; voiced by
Justin Fletcher) – A three-year-old orange-skinned boy with a yellow
mohawk. Being the youngest of the Tweenies, he sometimes feels left out and excluded from the other Tweenies' games when he is not big enough to join in. He is the kindest of the Tweenies and has a close bond with Doodles, often turning to him for comfort or advice when unhappy. He is also very sensitive and is prone to tears when frustrated. He will sometimes get words mixed up. He loves playing pretend, using his imagination, and dressing up, especially as his superhero alter-ego, Dotman. His favourite colour is green. His best friend is Milo.
Supporting •
Doodles (operated by Alan Riley and John Tobias; voiced by Justin Fletcher) – A red-and-yellow male dog. Doodles is very friendly, relaxed and calm. His favourite colour is yellow. His voice is based on that of
Scooby-Doo. He loves going for walks with Max and can often be seen looking out for Jake. •
Izzles (operated by Fiona Watkins; voiced by Colleen Daley) – A purple-and-white female dog, who was first introduced in 2001. Unlike Doodles, she is a puppy and therefore much younger and very energetic. Her favourite colour is purple. At first, her antics were not to the Tweenies' liking, more so Jake but she later calms down and settles in. The girls often like to dress her up in fancy accessories. She is also a companion for Doodles. She was originally going to be called Squiggles until it was realised that someone already had the rights to that name and that small children find it hard to say 'SQU'. •
Max (operated by Simon Grover/Matthew Lyons (some episodes); voiced by Bob Golding) – A pink-skinned man who is one of the two managers of the playgroup of the Tweenies. He speaks with a
Yorkshire accent. He loves animals, trains, fixing different things around the playgroup, and exploring the outside world. He is the oldest member of the group. •
Judy (operated by Simon Grover/Sinead Rushe (outside); voiced by Sinead Rushe) – A green-skinned woman who is the other of the playgroup managers. She speaks with an
Irish accent; in the episode "Wedding Party", she returns to her native Ireland to attend a wedding. She loves reading, gardening, being creative and giving good advice to the Tweenies. ==Episodes==