As character names:

U+3099 COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK character (゙)

As raw characters:

゙

As a string of HTML entities:

゙

Decoder output:

Byte number 1 is decimal 227, hex 0xE3, octal \343, binary 11100011
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 130, hex 0x82, octal \202, binary 10000010
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 153, hex 0x99, octal \231, binary 10011001
This is continuation byte 2, expecting 0 more.

U+3099	COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK