Aidan had always been kind, confident and considerate since childhood. However, as he grew older and got exposed to the true nature of civil war, Aidan became very scared of dying, he favored exterminating others rather than being exterminated. He only lived with the thought of surviving and returning back to his family and childhood friend as well as lover Maria. Although horrified by it, Aidan was able to accept the fact that all his comrades were being annihilated in the war, which made him traumatized and scarred with everything that happened around him. He didn't want to hurt or kill anyone, not being able to understand the reason why people had to fight and kill each other. As a human being, Aidan felt completely lost about who decided that things should end the way it did. He wished to have never taken part in the war and dreamed of returning back home since he wanted to meet everyone in his hometown again.

It is also seen that Aidan was a very helpful young man with a strong sense of justice, as he would rather see Yale, someone younger than him, survive rather than himself. He would always put people before himself and cherished his comrades deeply. He also wanted everyone, including himself, to live a happy life, free from the conflicts of the war. His parents and his girlfriend Maria meant everything to him, and he is sorrowful to have left them behind before thanking and apologizing to them properly, which he regretted more than anything. However, he was able to rest peacefully as Violet gave him the warmth he required in his last moments and since she promised that she would convey his feelings to his loved ones.