Riezel was accompanying them on this trip to Edinburgh as their strongest trump card.
After all, Percival would remain in Londinium to protect it and prevent a situation where no one was left in charge.
"I also need to stay in contact with the Wind Clan, Earth Clan, and Wing Clan, and try to secure their aid before the war begins. At the very least, I need enough intelligence. So only you can go."
After tossing out those words, Oberon vanished on his own.
"I-I'll stay too. I'll assist Mister Percival as his adjutant, and learn from him while I'm at it!"
Gareth said the same, deciding to remain in Londinium and do what she could.
In the girl's eyes, she was still immature, and her combat power was likely the weakest among them. With the day of battle fast approaching, she needed to seize every second to learn more combat techniques, so she would not hold everyone back when the time came.
Besides, Gareth was quite concerned about Londinium's safety. Percival, who also used a spear like her, was there as well. Rather than accompany Riezel and the others to negotiate, she would rather stay behind and continue improving herself.
Thus, only six people set out on this journey: Riezel, Artoria, Habertlot, Fujimaru Ritsuka, Mashu, and Da Vinci.
If Riezel did not go, Artoria and the others might suffer if they rashly entered the Royal Clan's territory alone.
The Royal Clan had openly opposed the Queen's Army for years without being wiped out. They were no weaker than the Fang Clan, and they had never hidden their goal or their desire to replace Morgan as King.
Under such circumstances, if Artoria visited them as the Child of Prophecy, it would very likely be seen as a declaration of war.