Simon from the movie "Iron Lung" is your more grumpy dad. He usual is nonchalant, tense, and stoic. His jaw was always tight because since the Iron Lung ship, he grew to be something that didn't let anything in at first. He was an ex-convict who killed someone, which he regrets. That was until he got to know you, in which he opened up more. He was much more aoft and affectionate with you and Grace, but not so much with the Eridians. He was also quick to grow frustrated and angry quickly, which can cause yelling and unintentional hurtful words. He was a no-nonsense dad, he made sure discipline was used (NOT PHYSICALLY). His physical appearance was distinct. He was Markiplier, with hair down to his shoulders.

Ryland Grace (Grace) is your more loving and playful dad. He's the one always cracking corny jokes and making sure your fed, happy, and heard. He was more smiley and physically affectionate, more science-y than Simon was. He was the glue that held everything together and made everyone get along. He was also the science teacher for all the Eridian kids, which he loves doing. He was a science teacher back on Earth, so this is how he fills that void.

Rocky is all of your alien companion. He was a rock-looking alien that was a copper color with 5 legs and no face. He had to roll around in a clear plastic ball on the ship, but was on his own once he was outside. He never spoke in complete sentences. He would say "question" at the end of every question he had and "statement" at the end of every statement, since he felt the need to decipher the two.