係 is a traditional Chinese hanzi, listed here under the keyword “bind”. It is built from 亻 (person) and 系 (system). It appears as a component in 1 other character in this index.
On KumiJi Glyph Explorer, open the parts search and type “person” + “system”. 係 is among the results, together with every other character containing the same shapes.
Open 係 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.