卫 (radical 26 卩+1, 3 strokes, cangjie input 尸中一 (SLM), composition ⿻𠃌丄)
Folk etymology claims that this simplification of 衛 (wèi) may have been influenced by the Japanese katakana ヱ (we).
Another theory claims it's a variant of 𫝀; see https://www.zhihu.com/question/23017758.
|For pronunciation and definitions of 卫 – see 衛.
(This character, 卫, is the simplified form of 衛.)