Undefined Character (U+1E684)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𞚄` `𞚄`
UTF-8 Encoding:	`0xF0 0x9E 0x9A 0x84`
UTF-16 Encoding:	`0xD839 0xDE84`
UTF-32 Encoding:	`0x0001E684`

References