The phrase "plays Judas" refers to someone who betrays another person. The opposite of playing Judas would therefore be to remain loyal and trustworthy. Synonyms for this would include being faithful, devoted, reliable, and steadfast. These qualities are highly valued in any relationship, whether it be personal or professional. On the other hand, antonyms for playing Judas would include disloyal, unfaithful, treacherous, and deceitful. Such attributes can lead to the breakdown of trust and can have serious consequences in any relationship. Therefore, it is important to cultivate and nurture positive qualities such as loyalty, honesty, and trustworthiness to maintain healthy relationships.