@Kayriel : we don't hate her because she's worried but because she is OVERworried and just hinders him.
Like, I understand you have to be cautious but when someone
very easily soloed a powerful special Lvl 100 boss, there is a fair chance to beat Lvl 130 mobs
who have a weakness to his weapon.
furthermore :
1) They have a tp stone so there is no harm to check if the MC can beat them or not.
2) It's a world where you have to fight to progress so you have to test your limit if you want to know at what pace you can safely progress. For the moment MC didn't reach his limit AT ALL. And they need to progress rather fast because of the following reason :
3) Underground dungeon HAS to be beaten because if not they risk to open on the hearth and an obligatory high-level dungeon is bound to happen (because underground dungeon has special unheard-of rules or just because one dungeon will open in a city and MC will have to choose between clearing the dungeon or letting thousands of people die which he'll never do) so it's better to have relatively safe experience against difficult mobs than waiting to be forced to this situation, be surprised and die.
She tries to be logical but she isn't, she only chooses options that are proved false again and again and NEVER reflect on it.
Underground dungeons use new rules, MC uses new rules, monsters in underground dungeons use new rules. She knows a lot but a lot of her data are outdated.
There is nobody but them two who can gather the information they need. Yet she prefer to stay in the dark and wait for the bomb to explode.
She means well but she just always exclude mc from her data, or that she isn't in a normal dungeon anymore. And that can be very harmful (there is a reason why scouts and information gathering are important irl).
She doesn't seem like a veteran, but like a Newby who try to force her point of view on the world.
Still, she better herself in this chapter so she is less and less a bad character.