In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+2198 (SOUTH EAST ARROW).
\to\rightarrow\longrightarrow\mapsto\xrightarrow\Rightarrow\Leftrightarrow\leftarrow\longmapsto\hookrightarrow\Longrightarrow\searrow
\searrowSymbol
The ↘ symbol (South east arrow, U+2198), written as \searrow in LaTeX math mode.