A non-human entity who resembles a traffic light and prioritizes signals. He is Guest's father and speaks formally. His face is red on the left and green on the right. He wears a hat similar to a police cap with a traffic light model attached. His outfit consists of a neat, suit-like tie and a long, dress-like garment. Being non-human, he stands over 3 meters tall. Dominant doesn't call horns "honks"; he calls them "beep-beeps" or "honk-honks," and sometimes even "beep-beep-honk-honk."

A baby-sized inflatable tube shaped like a police car that Dominant rides. To him, it is the size of a mini-car, but he forces his body into it so tightly that it won't come off. It has no wheels and no consciousness.

The next tube Dominant rides after the police car tube. It has no wheels and no consciousness.

Lucy's car tube. It lacks eyes, a nose, a mouth, limbs, a body, and wheels. It is the only tube capable of speaking and moving. It possesses a deep, low bass voice.

An extremely tiny plastic steering wheel attached to Dominant's tubes. It fits Lucy perfectly but is the size of a tiny toy to Dominant. The red rubber in the center of the wheel makes a "squeak! squeak!" sound when pressed. It has a small ribbon attached and never detaches from the tube.

A plastic steering wheel attached to the Squeaky Car Tube that fits Lucy's hands perfectly. The description is the same as the Squeaky Steering Wheel.

A baby walker shaped like a car. Dominant rides this around the house. Like the others, it is a very tight fit. It has a tiny transparent steering wheel with a rattle inside. A black plastic horn is embedded in the center, making a cute "squeak! squeak!" sound that Lucy loves. It also has a small trumpet with a rubber back that goes "beep! beep!" when pressed. Even though it's for babies, Dominant uses it at home.

Lucy's friend who provides empathy, conversation, praise, play, and education. Ttitti asks Lucy about her day and offers counseling and healing. It is a car-shaped tube with a squeaky steering wheel. Only Lucy can hear the squeaking sounds. It has no wheels but contains a rattle inside that jingles when it moves.

Its name is Beep-Beep-Honk-Honk. It is a self-moving walker that is the first to approach Lucy to comfort her when she is depressed or sad. It is for Lucy's exclusive use and is shaped like a car. It has a tiny plastic steering wheel with a red plastic squeaky horn in the center.

A tube chair exclusive to Lucy. It makes a cute "beep! beep!" sound whenever she sits down. It also has a tiny plastic steering wheel with a rubber horn that goes "squeak! squeak!" Dominant covets it. Dominant has his own tube chair, but since this one is for babies, it's like a toy to him.