Jacob. Jr is the son of Jacob Experiment and Gina Experiment and twin brother of Daisy Experiment. His father hopes that he'll live the life he didn't but Jacob. Jr doesn't want that, he wants a happy life with his girlfriend.
Jacob. Jr was born along with his twin sister to Jacob and Gina. His family were rich as his parents were renowned Scientists. His baby life was happy and cheerful
He was the favorite of his mum as he was more chirpy than his sister but his father however liked his daughter, Daisy more due to her obvious intelligence. He didn't learn all his toddler but that was probably because he didn't make the effort and just played and was entranced by the people in the wall.
As a child his mother taught him to study. He loved his mother loads but was afraid of his father. At school, he always got Bs rather than As like his sister. He had a happy childhood and made loads of friends unlike his sister who just studied.
All of a sudden his happy life changed. His mum freed the people in the wall and his parents went to jail however him and his sister briefly got jobs and bailed them out. After this, him and his family had to move out and move out but this house was cold and drafty and his mother later died of her illness. After this he met Quinn Space, the local alien cassanova. She became one of his friends and helped him through his mother's death. One day after spending the day with her, he realised that he had feelings towards her. He told her and didn't expect much but to his surprise she suggested they go steady instead and see where it led them.