Originally Posted by Unregistered

Sometimes you have good days and sometimes you have bad days. Got 3 golds in one run just this morning.

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It is worth to evolve a 4* girl?

Heavily depends on how well developed your squads are. If you're relatively new, and have only a handful of 5*s, or even none, then sure. If you've been playing a while and have a couple event 5*s, maybe a gacha one or two, or even a 6* from a lucky gacha draw, I wouldn't bother unless the 4* has a really useful ability (the only 4* who has an ability not held by higher rarities that comes to mind is Lilac, a magic type that ignores the Webs that slow your teams down on some maps)