This is one of those times you wish F- was a thing.

Misspelling your own name is something

She hit rock bottom, then proceeded to dig further down

Ipsi said in comment #2487770:

Misspelling your own name is something

This is actually a common cirno trait, because the kana for 'chi' in Chiruno is similar to the kana for 'sa', and children often mix up the two, causing her name to become "Saruno" in japanese language works, or "Sirno" in english if you're adapting it.