Ultras tend also to be official friends with some ultras, neutral or enemies. Milan ultras are friends with Brescia (old friendship), Reggina and Venezia, while worst enemies are Juve, Roma, Verona, Genoa and Sampdoria.
I heared a story that in the Coppa italia Palermo-Milan some boys stole a banner form a Milan fan, and the Palermo ultras returned the banner to the Barone. Between Milan and Palermo ultras there is neutral relationship, in fact when I was in Monreale last sunday a Palermo fan came to me (I was wearing Fossa dei leoni stuff) thinking I was an italian from Milan
and wanted to exchange his scarf with mine. I refused since to go to Milan i have to wait a minimun of 4 months.