Okay, so then.. Derpy will be 100% gone in S4, and there might be humans, Twi will be a Princess. What the hell, this is screwed over. Hasbro, you're fucking with a character you shouldn't have to get rid of since so many others like them.
You people aren't going down the right path now, the only people who are, are the animators who want to keep things that have been how they are. It angers me so much. I'm sorry, but I care to much for Derpy. At this rate, S4 might just be horrid compared to anything else.
A little from ~Ritsuka-Sylveon-Kun (https://www.deviantart.com/ritsuka-sylveon-kun) directly about relationships between the ponies.
Rina (as well as Hiro) and her mother, Aquarian Dance, get along very well. However; they don't get along very well with Crimson Rampit.
Thunder Chaser is a great younger cousin to Rina and Hiro, he looks up to Hiro. Rina adores her aunt Magenta Rose, and Seafoam Tide is an amazing uncle to her.
Spring Song and Brawny Boulder are in love and the others love them to, Spring Mane is the newest edition to the family and fawned over. Rina and Hiro love watching her.