Ferdinand relationship with the guardians is rich and colorful as a big weirdly relative family
Tooth - Ferdinand likes Tooth, but is a bit afraid of her to be honest, she can be too much vivid and intense in some themes at point in which is kinda creepy
North - best uncle ever, win all the prizes for the best!! always go to North’s place if is for gifts and snacks or funny tales!
Bunny - something in between an uncle/cousin/big brother depending of the moods, Ferdinand ocasionally ask him advices when he want a truely neutral answer for it
Jack - very good friends the two of them, Jack can act as a big brother to Ferdy in many times and they like to mess up with things every now and then
as for friends outside the guardians, he has a super close relationship with the harpies at sandmann’s tower, ocasionally they act as his confidents too