I have a special soft spot for Yo-Yo as, as a child, she was my first baby pegasus. :) She had fading pink hair and so can sometimes be found with her hair in white (my loose one has lost colour over the years). Her hair is also intentionally curly.

As her name suggests, playing Yo-Yo was a favourite activity of this little pony. But this was not her only comic depiction. The newborn ponies had an active relationship with the Petite Ponies, whom they kept a secret from the bigger ponies for quite some time. One story depicts Yo-Yo and Wiggles getting a 'distress alert' from the Petites, who need their help. They ultimately consult an intelligent giant for help resolving the problem. Stories like this show how much more independent these newborn ponies were compared to the initial release of Newborn Twins.