Californio's Links
Asen is CF's favorite person. Even if they're easily irritated and snap at him every now and then (which isn't enjoyable), CF is very fond of them. He wants to protect them, he doesn't want them to get hurt. He doesn't like seeing them in pain. He doesn't even understand why he wants to see them be happy, but he doesn't care for explanations like that.
While they might bicker every now and then, CF really is loyal to them.
Asen was scared at first, when everybody died except them and Californio, but it turns out CF didn't know what was going on either. Moreover, CF didn't care about Asen's appearance, which was great. CF has never been judgemental towards them, which made Asen get attached to him. They use him as a shield a lot of the time, and aren't afraid of admiting they rely on him, but there's a point where they dislike depending on him for everything.
CF is probably the person who has it easiest to embarrass and fluster Asen. It's possible that Asen develops feelings for CF, but it really is very confusing.
He doesn't make an attempt to understand Ceena at first, but does feel terrible for betraying them, even if he didn't know it was bad. He learned and apologized and just wants everyone to Get Along. She is nice, and he likes how friendly she is, and how Asen slowly feels more at ease with her as well.
At first she was scared by Californio, but wanted to understand where he and Asen came from, so she listened and realized they were pretty nice individuals, and saved mrs Selena. So it was all good, maybe she trusted them too much, because Californio betrayed them! He proved he was bad enough, and lost Ceena's trust.
Though, after a series of events, they make up and become a team.
Ceena and Californio get along, maybe not perfectly, but they don't argue or anything like that. Ceena is a little scared of him, but slowly realizes he needs guidance and not people to be upset at him.