Ngl, I can't remember anything about Runningwind,
except that he got killed by Tiger.
Which in a LongWind ship, ooh that's tasty. His prior allegiances and decisions coming back to kill his boyfriend
Runningwind was just sort of a generic ThunderClan background character warrior in the first arc. Shows up in several scenes with "average guy" energy, dies, and gives Firestar one of his nine lives.
The appeal of LongWind imo is that you probably just have a happier/chiller Longtail right from the start, since he'd have a partner outside the Tigerclaw clique. And they're just a couple cute tabby toms being cute together.














