In many anime series, the theme of survival is often portrayed through challenging situations that characters face, such as life-threatening battles, harsh environments, or societal conflicts. Characters may need to adapt, strategize, and make difficult decisions in order to survive. This theme can create tension and drama in the storyline, as characters navigate the dangers and uncertainties of their circumstances. Overall, the anime typically explores the resilience, courage, and resourcefulness of characters as they fight to survive in their world.