Majime Yamashita (aka Majime-chan) is a high-school student. She's very cheerful, in love with Shimeji-chan, has a lot of plushies and a cute egg on the head. The egg seems to be inheritted from her mother, who has a similar egg but of a smaller size on her head as well.
As one wise man once said: ‘On the one hand, Majime is a bright, cheerful character, and yolk often symbolizes the sun. On the other hand, she's a bit dumb, and a smashed egg is a symbol of incest in Buddhism. Now live with it’.
She is not really good at getting friends ss01. Her vast collection of plushies might be a reflection of that.