勾 is a Chinese hanzi, listed here under the keyword “hook”. It is built from 勹 (wrap) and 厶 (private). It appears as a component in 7 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “wrap” + “private”. 勾 is among the results, together with every other character containing the same shapes.
Open 勾 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.