As character names:

U+17F9 KHMER SYMBOL LEK ATTAK PRAM-BUON character (៹)

As raw characters:

៹

As a string of HTML entities:

៹

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 185, hex 0xB9, octal \271, binary 10111001
This is continuation byte 2, expecting 0 more.

U+17F9	KHMER SYMBOL LEK ATTAK PRAM-BUON