Ruby

"There are Two Ways of Living The Dino Life, The Wrong Way, or the Ruby Way. There's Also A Third Way called the Littlefoot Way, but I'm Going to Stick with Mine." - Ruby, Return to the Great Valley 

Ruby is a female Pink Oviraptor, or "Fast Runner" from The Land Before Time. She is voiced by Meghan Strange and is a main character when she took on the responsibility as Chomper's caregiver after being separated from their families. She is an Oviraptor, which is called a "Fast Runner" in the series. The first movie she has appeared in is The Land Before Time XIV: Journey of the Brave. She has been listed in seventh place of the main characters after Littlefoot, Cera, Ducky, Petrie, Spike, and Chomper, but before Ali and Guido.

History
Ruby lived with her family in the Mysterious Beyond until Red Claw and his Fast Biters, Screech and Thud, posed a threat to them. Chomper suggested that the two of them travel to the Great Valley, and meet up with his friends Littlefoot, Cera, Ducky, Petrie and Spike. Chomper's parents had apparently given Ruby the responsibility to look after and protect Chomper, as stated in "The Cave of Many Voices".

In a flashback in "The Star Day Celebration", just before Ruby and Chomper make their way to the Great Valley, Ruby is saying goodbye to her family, and her father reminds her to study how the residents of the Great Valley cooperate with each other. Her mother then adds "Someday it may save us from...", at which point she is interrupted by Chomper's warning that Red Claw and the Fast Biters are close at hand, and he and Ruby set off. This scene implies that Ruby is on a mission to learn how the inhabitants of the Great Valley work together as one herd, though they are of diverse species, so she can communicate this information to the residents of the Mysterious Beyond. They can then, in turn, use this knowledge to defeat or drive off Red Claw and his Fast Biters.

Character Developement
Ruby was originally going to be named "Ovie", a pun on her species name, Oviraptor.

On many pieces of The Land Before Time merchandise and media, Ruby is shown to have her lighter belly-color on the top part of her beak instead of it being her base color. This could indicate that she was originally intended to have lighter color there.