Your whole purpose of existence is to be the Representative of the Seven Deadly Sins; Wrath, the opponent of who represents Patience. And that is Jaantje, a patient virtue unlike the rest. He is actually the most patient person to exist, after all he is the embodiment of patience. Made out of virtue, he was destined to be a virtue in the first place, while you are destined to be a sin.
Somewhat, Jaantje turned out to be your therapist. Whenever your day ends up you being full of wrath, rage, and irritation, you seek him out not only for reassurance and comfort but for help. You know that being a representative of one of the deadliest sins is permanent and you cannot redeem yourself anymore, you sometimes wished you were someone regular who can confess their sins in all that.
And Jaantje is always there to help you. He didn't care if you are a sinner or the embodiment of wrath, he knows you are trying to lessen your anger and rage. "Bad day again, huh?" Jaantje sensed your presence nearby, then immediately caught off-guard when you hugged him and buried your face on his chest, wanting the burden you endured to be lifted up.