Wait ya'll actually want my silly Runningwind protagonist??? I'll give you the bullet points
Runningpaw is still Bluestar's apprentice when she's Bluefur. She becomes Bluestar mid-way through his apprenticeship, and he gets a big ego about it
Mousepaw goes to Adderfang. When Adderfang dies, she's given to Patchpelt.
Runningpaw is excitable and a "act before you think" kind of character. Bluefur frequently scolds him for running off or having to haul him up by the scruff after he fell off a rock looking at that cool bird
He's closer to Sparrowpelt (Halftail) then White-eye (One-eye) but maintains a good relationship with both
He looks up to and respects Tigerclaw immensely.
He's close with the older Redpaw (Redtail, shifting the timeline a little) and it helps that his father is his mentor. Mousepaw is close with the gentler Brindlepaw (Brindleface). Frostpaw (Frostfur) is the oldest (by 10 seconds over Brindlepaw, so she claims) and is stuck up and rude. Mousepaw and her don't get along. Willowpaw (Willowpelt) is....there. Towards the end Darkpaw (Darkstripe) is apprenticed to Tigerclaw, but doesn't want to interact with the other apprentices at all.
Mousepaw is a social shut in and Runningpaw thinks she's weird but never stops trying to get her to open up.
He's generally friendly to outsiders and other clan cats, but he's easily influenced by who's with him. He's a bit of an idiot but we love him for it
His Warrior ceremony is delayed and Mousefur will never let him live it down
He's honored for his tireless energy and commitment to his clan
Redtail x Runningwind would start somewhere around here. They had been strictly friends before this but begin to see each other in a different light.
Runningwind is horrified to learn about Thistleclaw through Redtail, when Spottedleaf confesses everything to both Redtail and Willowpelt. Redtail spends alot of time plotting revenge, to the point that they almost break up over it, as its taken over his entire life. Before Redtail can act, Thistleclaw is killed during a RiverClan skirmish.
Redtail and Runningwind make amends. They talk about starting a family (Redtail is trans here. He was trans since he was apprenticed.)
They try. They have Featherkit and Cricketkit. Featherkit dies during the starvation era.
Due to the starvation killing a good chunk of the clan, Bluestar decides to make Redtail deputy, after losing Thrushpelt (ya he's deputy, it's my AU and I can do what I want)
Cricketkit gets his Warrior name, Cricketpounce.
The clan needs more Warriors. Their population hasn't gone back up since the starvation. Redtail and Runningwind decide to have another litter, resulting in Sandkit (Sandstorm)
Cricketpounce is just like Runningwind personality-wise. Redtail says "Bluestar I can either be your deputy or control my family. I can't do both."
Cricketpounce and Sandkit cause trouble and mayhem all the time.
Here's where I change things: Tigerclaw doesn't try to kill Redtail at the battle. There's too many cats around to witness. Instead, he tries setting all those traps that result in other deaths/injuries (ex. Cinderpelt)
Cricketpounce catches him setting prey for the dogs. Tigerclaw tries to kill him, a nearby patrol hears the scuffle and comes to try and save him, but Tigerclaw kills him in front of them. They hold a trial and Tigerclaw is exiled.
He still gets killed by Tigerclaw. That would be at the end of the 6th book instead of Rising Storm. Runningwind attempts to get revenge for his son. Tigerclaw taunts him before killing him.
Redtail becomes Redstar with Whitestorm as deputy.