The location that Ben had given them was quite far inside the Desolate Plains of Gahana. While driving toward that location, Rein told Sophia and Ruby about Prucia and how she was actually a real intelligent monster. He also told them about how she and an amber of eternal fire inside her and how dangerous she could be. All this revelation made both Sophia and Ruby extremely surprised.
It was very understandable. According to what Rein said, this girl was a calamity that could destroy several nations without any problems. If her presence allowed the other monsters to leave the Desolate Plains without dying, then hundreds of not thousands of powerful monsters could attack the human cities. This would need many nations and their UR grades to team up together in order to solve it.
But for the time being, all three of them decided to not worry about it. All of them had confidence in their strength so even if what they were thinking happened, they would do their best to stop it.
After discussion about Prucia was over, the three of them started to think about their current mission. As they were unfamiliar with the area, first they needed to scout it out. Rein was going to use his special emotion sensing technique while Sophia would take to the field to scout it out.
Ruby did not really have any techniques that would be useful for scouting, so she would protect Rein and the car during this time.
As for what to do next, they would think about it after the scouting was done. So Rein increased the speed of the vehicle to reach their destination as soon as possible. But they neared the desolate plains, the temperature started to increase by a lot. Rein had to use his ice abilities to lower the temperature inside the car or it would have been too uncomfortable.
...
After entering the danger zone, Rein was planning to drive straight to the area that Ben had located but monsters got in their way. As they were at the other area of the Desolate Plains, the monsters here were quite weak. But their numbers were quite high so Ruby had to come out of the car to clear them out of the way.
That was the reason why it was decided that two of them would be in the lookout duty while one of them would sleep. This was the only way they would be able to make sure that no one would be in too much danger. The first one to go to sleep was Rein and he was planning to wake up in an hour or so. As he had his perfect body, he needed very little sleep.
So he went to bed first to make sure that Sophia and Ruby would be able to sleep longer.
As Rein went to bed, Sophia and Ruby started to talk. Even though both of them had a decent relationship, as they had not known each other for long, there was still a barrier between them. But today after fighting against hordes of monsters side by side, they had gotten closer than ever before. Now both of them were able to treat each other as close friends and comrades.
Ruby was a bit hesitant to bring up the topic that she was thinking about but at the end she mastered up the courage and asked Sophia about her opinion on Rein. It was clear that Sophia and Rein were in a relationship and Ruby did not want to become a third wheel in the relationship. But at the same time she was unable to give up on her feelings for Rein.
So after worrying about it a lot, she decided to bring it up with Sophia.
Ruby had mastered up a lot of courage and was even ready to apologise if Sophia was displeased with anything she would say. But unexpectedly, after hearing this question, Sophia actually smiled gently. Then she told Sophia something that she had expected. Sophia actually told her that it was fine to love Rein and to even have a relationship with him.
Even though monogamy was the norm in this world and the culture in which Sophia had grown up was also monogamous, she had a good idea about polygamy. As a very jealous person, she obviously wanted Rein to depend on her and become hers. But at the same time she was quite fond of Ruby and even thought of her as a little sister. So she did not want her little sister to be sad.
That was the reason why Sophia was fine with Ruby joining her family.
Just as Ruby was about to open her mouth to say something, a loud roar was heard and Sophia and Ruby felt a powerful killing intent. They immediately stood up and got ready for a fight. At the distance they saw that a mountain was moving toward them. It was actually not a mountain but a monster as large as one. Immediately Ruby and Sophia got ready for a tough battle.