Loyal: giving or showing firm and constant support or allegiance to a person or institution
”Football fans expect their players to be as loyal as they are.Traitor: a person who betrays someone or something, such as a friend, cause, or principle
”Sol Campbell was accused of being a traitor when he moved from Tottenham to Arsenal.”Judas: a Biblical character famous for betraying Jesus
”Sol Campbell will forever be referred to as ‘Judas’ by Spurs fans.”