Character combat and touching the character can increase the character's trust value.

1. Add characters whose trustworthiness you want to increase to the combat team and conduct combat. After each battle is completed, all operators in the action formation will each receive the same amount of trust points. The trust points gained are the amount of sanity consumed in this battle. The trust value improved under different circumstances is different. When the level is cleared with three stars or above and the battle ends when the level is destroyed, the trust points gained are the amount of sanity consumed in this battle.

2. When entering the infrastructure system, clicking on the icon above the character's head to interact can also increase the trust value. At 04:00 every day, operators stationed at any infrastructure facility will receive a small amount of trust points that can be collected. At 04:00 and 16:00 every day, up to 5 operators designated as infrastructure deputies will receive more trust points that can be collected.

The above is the relevant content about how to increase the trust value of Arknights. I hope it will be helpful to you!