[RedHead]

Flintspirit could be some sort of “friendly rival”, at least on Flint’s side. Flint would find Lion amusing, but he also wouldn’t back down as he sees himself as the dominant tomcat in most situations. He personally enjoys teasing Riverclan cats, so that could tie into it as well.

Saltpaw could be an annoying little apprentice that tries to gain his attention

Then Risingsun and Splashcloud could friends (though they would try to flirt with him, mainly Rising, Splash would probably just “assess” him for her brother)