In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+2190 (LEFTWARDS ARROW).
\to\rightarrow\longrightarrow\mapsto\xrightarrow\Rightarrow\Leftrightarrow\leftarrow\longmapsto\hookrightarrow\Longrightarrow\implies
\leftarrowSymbol
The ← symbol (Leftwards arrow, U+2190), written as \leftarrow in LaTeX math mode.