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+026A 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:
Small capital I is an additional letter of the Latin alphabet similar in its dimensions to the letter "i" but with a shape based on ⟨I⟩, its capital form. Although ⟨ɪ⟩ is usually an allograph of the letter I, it is considered as an additional letter in the African reference alphabet and has been used as such in some publications in the Kulango languages in Côte d'Ivoire in the 1990s. In the International Phonetic Alphabet, the lowercase small capital I /ɪ/ is used as the symbol for the near-close near-front unrounded vowel, like letter i in the word "Fit".