They first meet when Fi joins Grim and Desthroc on a mission to a dangerous forest. At first, they don't get along at all, often getting into fights. Grim doesn't want to see Fi as part of the team and doesn't want her to know anything about him. Over time, after they've been through lots of dangers together, he learns to appreciate her. They slowly become friends and as they get to know each other better, they even become lovers. Fi feels like Grim is one of the only people in the world who will always support her choices, no matter what. They get a lot of support from each other.

At first, Desthroc and Fi instantly get along. Fi likes his attitude and going on adventure with him seems to be just perfect. Until she learns he's keeping a lot of secrets and might even be working against her. It takes a long time for him to regain her trust, but she learns to see that they don't necessarily need to share the same goal to get along. They become friends again in the end.

For some reason, Tyssefer and Fi seem to have quite a good friendship right off the bat. Fi becomes one of Tyssefer's few trusted friends. They have a good bond.
(More details once I get to more character development for Tyssefer XD)

After Fi has been possessed by Person X, she starts to change. She feels a lot of anger towards the entire world and wants to prove that she's worthy because she has a feeling that everyone looks down on her. She starts a city of Ra-aR, leading them under a disguise called Corra. Later on, she reveals herself and lives her life as Corra, letting Person X's hatred consume her entirely.

Person X is the big enemy in Fi's life. In her mission to protect the old deities, he's her direct opponent, trying to kill them all. Unfortunately for her, he also takes a special interest in her when he discovers she's destined to be the vessel for Life's powers. He gets her mixed up in a mess with her believing she can indeed be a vessel, but to trap Person X and seal him. With this mistake, she's an easy prey for him and ends up indeed being a vessel, but not in control of his soul. He takes over her mind and uses her to finish his mission and kill the deities.

Fi takes it upon herself to look out for Stossyn in this world and to make sure no one learns of his true abilities and function as guardian of souls. (More added later as I develop Stossyn better)

As kids, Mu and Fi were very close, but as they grew older and Fi realized the bad intentions of her family, they started to grow apart. For a long time, Mu was the only reason why Fi didn't run away from her family sooner. She tried to convince her sister to run with her, but when that didn't work out, she ran away on her own. When they meet again, they have both changed into completely different people than they used to be. Fi still attempts to get Mu to leave.

For the longest time, Fi travelled together with Lux. When she first joined Veva's Order, Lux was assigned to her as her mentor. However, Fi had always had to take care of Lux more than the other way around. While Fi dearly loves Lux and sees him like her own brother, she feels like he will always hold her back from achieving her goal. She leaves him and sets off to fulfill her mission on her own. This is a choice she always partly regrets and feels guilty about, but one she had to make nonetheless.

Fi first met Veva when she ran away from home and sought shelter. She became part of Veva's order, to protect the deity Serengszel. While they rarely met in person, Fi always looked up to Veva, sort of idolised her. When Veva joins in the mission to find Serengszel and Fi actually get to know her, her perfect image of Veva is ripped apart. While they do get along for the mission, it ends there.