Are Gemini and Pisces contradictory? Can two constellations be friends?

Gemini, as its name implies, has two heavy personalities. When it is quiet, it is very withdrawn, and it quarrels like a madman and Pisces. It's multiple personalities. In fact, these two constellations don't get along very well because of their personality problems. . . . Personal opinion+real life (I'm Pisces, my sister Gemini) but it doesn't matter, the relationship is still good, just like me and my sister.