She's a silver lining
A silver lining is a idiom used to express a good thing that comes after a bad thing.
Whenever he’s having a bad day, he can look forward to seeing her. She’s able to bring positivity into his life.
The Lone Ranger’s white stallion was named Silver with the famous catch phrase whenever they rode off.
Hi-yo, Silver! Away!
Also a possible allusion to Hi Ho Silver Lining originally released by The Attack but made famous by Jeff Beck.
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