In the past, Otto was obsessed with Kallen. He is the heir of the Apocalypse family. He is also very intelligent when it comes to science and technology. He is a fraud and uses his charm to get everything. He played with people's emotions and used them to his own advantage. He's a stubborn clown. Sensitive to potential threats, he is cruel, twisted and treacherous, killing millions for his own selfishness. He was the cause of many problems. He has quite a problem communicating with his lover.