User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-4802891-20170313083653/@comment-4802891-20170314152625

Actually, Trust isn't a skill that affects how he is perveived by others, but how he percevies others, and himself.

At E~D rank, this skill has barely but D~B rank, he would be able to tell one's flaws and advantages (see how they would fit the best in his tactics). At A rank and above, it acts like Caesar's Incitement, giving significant bonuses to the person he entrust a mission onto, assuring its success.

His rank EX has a weird side effect of boosting his own parameters and skills, because his self-confidence is beyond that of a normal man. As it affects his Charisma, it also affects how people would react to his Trust in them, increase any given bonus.