"Ela aparece de manhã."
Tradução:She appears in the morning.
Shows up is used when someone arrives at their own pace, as in they are early, late, or arriving at an undetermined time, but were expected. Appears is more of a surprise.
"He said he would be here at 8, but he showed up 15 minutes late."
"He appeared at the party uninvited."
Sorry this is in english, but my portuguese isn't good enough for writing, only reading. I hope this helped! :)