This character is a Other Letter and is mainly used in the Arabic script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written as Arabic letter from right to left. When changing direction it is not mirrored. The word that U+0686 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 4 other glyphs.
The Wikipedia has the following information about this codepoint:
Che or cheem (چ) is a letter of the Persian alphabet, used to represent [t͡ʃ], and which derives from ǧīm (ج) by the addition of two dots. It is found with this value in other Arabic-derived scripts. It is based on the jimج. It is used in Persian, Urdu, Pashto, Kurdish, Uyghur, Kashmiri, Azerbaijani, Ottoman Turkish, Malay (Jawi), Javanese (Pegon), and other Indo-Iranian languages. It is also one of the five letters the Persian alphabet added from the twenty-eight inherited from the Arabic alphabet (the others being ژ, پ, and گ in addition to the obsolete ڤ). It is also one of the ten letters the Persian alphabet added from the twenty-two inherited from the Phoenician alphabet (the others being s̱e, xe, ẕâl, zâd, ẓâ, ġayn, pe, že, and gaf). In name and shape, it is a variant of jim. Its numerical value is 3000 (see Abjad numerals).
When representing this sound in transliteration of Persian into Hebrew, it is written as ג׳ gimel and a geresh.