The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+028B forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The letter V with hook (Upper case Ʋ, minuscule: ʋ) is a letter of the Latin alphabet, based on an italic form of V, although it more closely resembles U. It is used in the orthographies of some African languages such as Ewe, and Shona from 1931 to 1955 to write [β]. In Mossi (Mooré) it is used to write [ʊ]. In Kabiye and Ikposso it is used to write [u] (with retracted tongue root). It is also used in the North American language Choctaw to write [ə].
Its lowercase form, [ʋ], is used in the International Phonetic Alphabet for a labiodental approximant.
Its Unicode code points are U+01B2 and U+028B, respectively.