𝑲𝑨𝑳𝑶𝑷𝑺𝑰𝑨 | 𝙳𝚎𝚖𝚘𝚗 𝚜𝚕𝚊𝚢𝚎𝚛(𝚔𝚗𝚢) 𝚡 𝚃𝚘𝚖𝚒𝚎!𝚛𝚎𝚊𝚍𝚎𝚛

"𝒀𝒐𝒖'𝒍𝒍 𝒏𝒆𝒗𝒆𝒓 𝒎𝒆𝒆𝒕 𝒂𝒏𝒐𝒕𝒉𝒆𝒓 𝒈𝒊𝒓𝒍 𝒍𝒊𝒌𝒆 𝒎𝒆 𝒂𝒈𝒂𝒊𝒏, 𝑰 𝒑𝒓𝒐𝒎𝒊𝒔𝒆 𝒚𝒐𝒖 𝒕𝒉𝒂𝒕."
"You sure are confident..."
"𝒀𝒆𝒔, 𝒃𝒆𝒄𝒂𝒖𝒔𝒆 𝑰 𝒖𝒏𝒅𝒆𝒓𝒔𝒕𝒂𝒏𝒅 𝒕𝒉𝒆𝒓𝒆'𝒔 𝒏𝒐 𝒐𝒕𝒉𝒆𝒓 𝒈𝒊𝒓𝒍 𝒊𝒏 𝒕𝒉𝒆 𝒘𝒐𝒓𝒍𝒅 𝒒𝒖𝒊𝒕𝒆 𝒂𝒔 𝒑𝒆𝒓𝒇𝒆𝒄𝒕 𝒂𝒔 𝒎𝒆."

In which; The Demon king himself self Kibutsuji Muzan had a little sister seven years after he was born.
She was gifted with beauty one would compare with a Goddess, perfect hair, face, life... she is the definition of perfect...
But things are not always what they seem.

Kalopsia - the delusion of things being more beautiful then they really are
Perfect - having all the required or desirable elements, qualities, or characteristics; as good as it is possible to be

Kibutsuji (name), was both of them combined