This cast of characters, unlike most, refers to personalities that share a body. We do not suffer from Multiple Personality Disorder. This is commonly referred to as Dissociative Identity Disorder nowadays, but our experience certainly involves an element of dissociation and I won't preclude the possibility that a qualified professional might diagnose it as such if it were brought up in such a setting, so I'm going to stick to the older term in order to make it clear that what is meant is that for the most part, we do share our memories and know what is going on when any given part is in charge.
Kaylee
Kaylee is my inner five year old's pseudonym. She's bright and cheerful, incredibly friendly, and the least cynical part of me. She's also very sensitive and easily hurt, so I'm very protective of her. She's very proud of being five years old and a big girl and she has more energy than I know what to do with sometimes. She'll also talk your ear off if you let her. She loves hearing stories and coloring and play dough and building things and squishing finger paint between her fingers and spending hours on the swings or the teeter totter. When she's sick or cranky, she wants nothing more than cuddles and comforting. Most of my age play experiences revolve around Kaylee since her needs tend to be both more active and more interactive than the rest of ours.
Teagan
Teagan is my inner preteen/early teen. She's pretty mature for the most part, but there are some definite areas that could use work. She's a lot more reserved than Kaylee and doesn't jump into friendships anywhere near as quickly. While she'd never admit it, she craves limits and she struggles with the fact that we have to set our own and enforce them ourself. While Kaylee definitely can't handle grown up responsibilities, Teagan can, and she sometimes acts as an intermediary when it's hard to get into a grown up headspace but we nevertheless need to take on grown up concerns.
The baby
The baby doesn't actually have a name. She doesn't think of herself in terms of names and she's never had a parent to care for her who might have need of a label to call her by. She doesn't tend to come out in public much. She doesn't really talk aside from rare babbles and her play isn't particularly interactive. Mostly she just likes snuggles and soft things and putting things in her mouth. Occasionally she'll peek out during bath time and spend an hour bobbing her ducky through the water and splashing about. Her needs are uncomplicated and easily met.
The big
While I have a name, it's a derivative of the name we all share, so I'm going to stick with "the big" for now. Just know that when we say "the big" we're referring to another internal character rather than a separate individual who functions as a grown up in relation to us. Since the term is often used in such a context, let me also make it clear that I don't participate in age play as anyone's grown up partner and have no intent to begin doing so any time soon.
The boy
Another minor character, the boy doesn't often make an appearance. When he does, he's most noticeable for his disdain of all things girly and his discontent with those parts of the body that are noticeably not-male.