The episode in question showed Opera wearing a mix of male and female uniforms, which I guess just made me realise that Opera must be non-binary. (Nyan-binary if you will)
Source: wiktionary
Nyan-binary
//ˌnjɑːnˈbaɪ.nə.ɹi//
Synonyms for "nyan-binary"
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.