Goblin Slayer does take off his helmet in the manga. However, it's not a frequent occurrence and is often tied to specific story events that add depth to the narrative.
I'm not entirely sure of the specific moment in the light novel when he takes off his helmet. It could be during a moment of rest or when he is in a relatively safe environment with people he trusts.
Taking off his helmet in the light novel could potentially be a turning point in his character development. Maybe it's a step towards him becoming more open and less consumed by his single - minded focus on slaying goblins. It could also be a way to humanize him more to the other characters in the story.
Goblin Slayer manga is indeed ongoing. It continues to captivate readers with its unique plot and character arcs. The creators are committed to bringing more exciting content.
The Goblin Slayer would likely first have to adapt to the new technology. He'd be cautious around blasters and lightsabers, but would quickly realize their potential in combat. He might start by observing how others use these weapons and then find ways to incorporate them into his own fighting style. For example, he could attach a blaster to his existing weaponry for ranged attacks. In terms of the setting, he'd have to get used to different planets and their unique environments. He'd probably study the local flora and fauna to see if there are any new threats or resources he can use, just as he does in his own world.