Caelan Moore's Links
Caelan has a huge, totally-not-subtle crush on Io, but is too preoccupied trying to hide it from her that they don't even realize the feelings are mutual. They often try to impress the demigod and can't stand seeing Io upset. They've been friends for several years, and through trials and hardships have developed a close bond.
Io has a crush on Caelan, and while she doesn't hide it, Caelan currently seems oblivious. They complement each other very well, personality wise. The two of them travel to various planets in the galaxy and hop back home when they need to or want to. Though she's usually very calm, Io can be very protective of Caelan, and if someone hurts them, Io takes after her mother in the rage department.