I now have this image of "Langa [Oliver's surname]" being EN Langa and "Hasegawa Langa" being JP Langa because their characterisations are very different (I call them "super boyfriend VS baby" 😂). I actually wrote a comparison table before by episode lol (in Japanese)
https://x.com/LRNuiLife/status/1804698510626836792?t=9nIPfRDS5nn9evSfLL5y0g&s=19