As character names:

U+31F1 KATAKANA LETTER SMALL SI character (ㇱ)

As raw characters:

ㇱ

As a string of HTML entities:

ㇱ

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 135, hex 0x87, octal \207, binary 10000111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 177, hex 0xB1, octal \261, binary 10110001
This is continuation byte 2, expecting 0 more.

U+31F1	KATAKANA LETTER SMALL SI