As character names:

U+1A54 TAI THAM LETTER GREAT SA character (ᩔ)

As raw characters:

ᩔ

As a string of HTML entities:

ᩔ

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 169, hex 0xA9, octal \251, binary 10101001
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 148, hex 0x94, octal \224, binary 10010100
This is continuation byte 2, expecting 0 more.

U+1A54	TAI THAM LETTER GREAT SA