U+1F21 GREEK SMALL LETTER ETA WITH DASIA

The Unicode character U+1F21, officially named GREEK SMALL LETTER ETA WITH DASIA, was introduced in Unicode version 1.1. It is part of the Greek Ext block, which belongs to the Basic Multilingual plane.

Categorized technically as a Lowercase Letter, this character typically falls under the Greek script. In terms of text layout and rendering, the glyph is a canonical composition and has no designated width in East Asian typography. When placed in bidirectional text, it behaves as an Left-To-Right character. Its visual representation remains not mirrored regardless of the reading direction.