First, a necessary etymology. "Sereia" is Portuguese for mermaid . "Ninfo" is a less common variant; in some contexts, it relates to nymph or a mythological water spirit, though in online handles, it is often a unique username. Putting the two together, appears to be a digital creator—likely an artist or writer specializing in fantasy, coastal surrealism, or anime-style mermaid/nymph hybrids.
Check the at the top of the timeline for the "fixed" content you are looking for. sereia ninfo twitter fixed
If you specifically can't see a "Fixed" (Pinned) tweet even after changing settings: Log Out/In: This forces the app to refresh your privacy tokens. Clear Cache: On Android, go to Clear Cache First, a necessary etymology