This character is a Other Letter and is mainly used in the Katakana script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This katakana joins with other adjacent katakana to form a word. U+30EB offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
る, in hiragana, or ル in katakana, is one of the Japanese kana, each of which represent one mora. The hiragana is written in one stroke; the katakana in two. Both represent the sound [ɾɯ] . The Ainu language uses a small katakana ㇽ to represent a final r sound after an u sound (ウㇽ ur). The combination of an R-column kana letter with handakuten ゜- る゚ in hiragana, and ル゚ in katakana was introduced to represent [lu] in the early 20th century.