Ares is a character from ancient Greek mythology. He's a god who is really good at fighting and is often associated with war. People used to believe that Ares would help them in battle if they prayed to him, but they also thought he could be dangerous because he might fight against them if they upset him.
Think of Ares like a superhero who is really strong and likes to fight. He wears armor to protect himself and carries a spear or sword. When people go to war, they might ask for Ares' help, hoping that he'll use his amazing fighting skills to help them win.
However, Ares can also be a bit scary because he represents the destructive side of war. Sometimes he gets so caught up in the fighting that he forgets about the consequences and gets out of control. This is why people in ancient Greece would try to keep Ares happy by making sacrifices and holding special rituals in his honor.
Overall, Ares was a very important and complex figure in ancient Greek mythology who represented both the upsides and downsides of war.