As character names:

U+235A APL FUNCTIONAL SYMBOL DIAMOND UNDERBAR character (⍚)

As raw characters:

⍚

As a string of HTML entities:

⍚

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 141, hex 0x8D, octal \215, binary 10001101
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 154, hex 0x9A, octal \232, binary 10011010
This is continuation byte 2, expecting 0 more.

U+235A	APL FUNCTIONAL SYMBOL DIAMOND UNDERBAR