Top 10 in Top 10 strongest demons in Chainsaw Man manga.
Cosmos Devil or mainly known as Cosmo. Compared to other Demons with destructive power, Cosmo will usually not attack physically, but mentally and emotionally.
Despite her innocent physique, Cosmo is one of the strongest Demons introduced in the series. With his abilities, Cosmo can trap enemies inside a massive library filled with different books about everything in the universe. With these, Cosmo will force the person to understand every knowledge and every detail of the universe until you lose your mind.