This character is a Other Letter and is mainly used in the Hebrew script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from right to left. When changing direction it is not mirrored. This letter joins with other adjacent letters and numbers to form a word. The word that U+05D3 forms with similar adjacent characters and the hyphen prevents a line break inside it. The glyph can be confused with 2 other glyphs.
The Wikipedia has the following information about this codepoint:
Dalet (dāleth, also spelled Daleth or Daled) is the fourth letter of the Semitic abjads, including Arabic dālد, Aramaic dālaṯ 𐡃, Hebrew dāletד, Phoenician dālt 𐤃 and Syriac dālaṯ ܕ (in abjadi order; 8th in modern order). Its sound value is the voiced alveolar plosive ([d]).
The letter is based on a glyph of the Proto-Sinaitic script, probably called dalt "door" (door in Modern Hebrew is delet), ultimately based on a hieroglyph depicting a door: