She might be initially shocked. But being Hermione, she would quickly gather her wits and start planning. She could use her vast knowledge of magic to find her way or to signal her friends.
In some cases, the antagonist could be a group of magical creatures that have been wronged by wizards in the past. They see Hermione as a representative of the wizarding world and when she is left behind, they try to make her pay for the past wrongs. These creatures could have unique powers and abilities that make them a formidable foe for Hermione.
One possible reason could be a misunderstanding. Maybe her friends thought she was following but she got distracted by something, like a new spell she saw in an old book. So they unknowingly left her behind.
A possible plot is that Hermione is accidentally left behind in a different time period. She has to adapt to the ways of that time while also trying to find a way back to her own time. During this, she might meet some interesting characters from the past, and her knowledge of magic from the future could either help or put her in more danger.
During the celebration, the weapon Ye Qingmei left behind was a Barrett sniper rifle. This sniper rifle was brought out by Ye Qingmei from the temple and had a powerful destructive power. Ye Qingmei had once used this spear to kill the Qing Emperor's two older brothers and help him ascend to the throne. This sniper rifle became Fan Xian's important weapon against the Qing Emperor.
During the celebration, the weapon Ye Qingmei left behind was a Barrett sniper rifle. This sniper rifle was brought out by Ye Qingmei from the temple and had a powerful destructive power. Ye Qingmei had once used this spear to kill the Qing Emperor's two older brothers and help him ascend to the throne. The Barrett sniper rifle became Fan Xian's important weapon against the Qing Emperor.
Well, it could be about Natsu being accidentally or deliberately left in a certain place. Maybe his friends go on a mission without him, and he has to find his own way back or prove himself while being left behind. It might also involve his feelings of abandonment and how he overcomes them.
Well, it could be about Natsu being left behind in Tenrou. Maybe it's a story where his friends accidentally leave him there during some sort of event or mission. It might explore his feelings of isolation and how he tries to find his way back to them.
Well, in the 'rwby ruby left behind fanfiction', it might focus on Ruby's character development when she's left behind. For example, it could show her facing new enemies or challenges that she wouldn't have encountered with her team. It could also delve into her emotional state, like feelings of abandonment at first, but then growing stronger and more self - reliant as the story progresses.