Hilde was in a situation where he had to fake his death. So he willingly allowed the enemy side to detain him and when the time was right, cut off his own right hand and left foot as biological evidence of his "death", then killed off all the enemies in the building. He did this without telling a single person uninvolved with his current operation, including his godson and his longtime friend. They had to find out from news outlets about his "death" and were left in a frenzy, unsure if he's really dead or still alive.

In the beginning, Hilde is completely useless in using firearms. This has been treated as more or less a running gag throughout the series, as his main weapon is a sword. Roughly 200+ chapters later it was revealed that the reason he can't handle the gun is because a child dear to him was shot the same way he had assassinated an enemy leader.

Ray, a character that had died prior to the start of the story and therefore never appeared in the present. Yet his presence constantly haunts the narrative, appearing when you least expect it. Another example is Kishis, also someone who only appeared in flashbacks. His presence is most prevalent whenever we are reminded of why Hilde work so hard to protect his compatriots.