Happy

Prince~
When Happy was first introduced, Prince was hApPy(Pun intended) To have somebody to play with. But when time went bye, Four was surprised when he realized Happy was pregnant.

Eight~
Happy has always been his loyal Service dog, Even if she couldn't speak, she loved him and always took care of him like if he was her own puppy.

Charlie~
Happy always loved her mother, but sometimes she wishes that Lucy would stop bothering her.

Joseph~
Happy was sad that Joseph couldn't be a service dog since he was a black lab, But, Charlie spoke to her why he couldn't. Happy accepted and sometimes, she misses him.

Lucy~
Lucy always teased her, saying she wouldn't seceded as Service dog since she was half-Lab and would never have pups. Happy ignored her.

Trivia~

 * Eight named her Happy cause he learned that Yellow means bright and happy.