役に立たない人
役に立たない人間
居ても役に立たない人
役に立たないさまの
実際には役に立たない人
a person who is neither beneficial nor harmful
いいかげんで役に立たない人
a person who is both unreliable and useless
an individual that one is not acquainted with
a person who belongs to no particular group
a stranger
a person who does nothing
a man without settled convictions