U+1B155 "𛅕" Katakana Letter Small Ko Unicode Character

U+1B155 "𛅕" Katakana Letter Small Ko is a rarely used character in modern Japanese, representing the small form of the katakana syllable "ko" (コ). It is part of the Kana Extended-A block, specifically included in the Unicode standard to support historical and linguistic texts where smaller kana characters were used for phonetic precision, such as in rendering older transcriptions of foreign words or in certain dialectal studies. Unlike the standard small kana in Japanese (like ァ or ィ), this particular character is not typically found in contemporary writing, but its inclusion ensures accurate representation of archival materials where such detailed glyph variation was employed. Its design mirrors the shape of the full-size katakana "ko" but is reduced in scale, functioning primarily as a notation tool rather than a standalone phonetic component.