The Word is:”who”
who
/huː,hʊ/
pronoun
pronoun: who
1. what or which person or people.
“who is that woman?”
2. used to introduce a clause giving further information about a person or people previously
mentioned.
archaic
the person that; whoever.
“who holds the sea, perforce doth hold the land”
“Joan Fontaine plays the mouse who married the playboy”
the person that; whoever.
“who holds the sea, perforce doth hold the land”
Source credit: Google