Skills are special Techniuqes that an offical has. It may be passive or non-passive. Sometimes just having the officer with a skill immediately triggers it.
“Merciful is a Skill that few people posess. Merciful is only seen in San Wan at the moment.Mercifulness
“Bandit Persuasion is a special techniuqe that requires the officer to have the Negotiation skill...Bandit Persuasion