The series that is about immortal characters is "Highlander." This show follows the story of Duncan MacLeod, an immortal Scottish swordsman who must battle other immortals in order to survive. The concept of immortality and the moral dilemmas that come with it are central themes throughout the series. **

In the movies, the Ghost Rider is depicted as being nearly immortal. He is able to heal from almost any injury and is resistant to most forms of physical harm. However, it is suggested that he can be killed by certain supernatural means, such as the power of heaven or hell. Overall, while not completely immortal, the Ghost Rider is extremely difficult to kill in the movies. **

Kaido is often referred to as "indestructible" or "invincible" due to his incredible durability and ability to withstand massive amounts of damage. However, it has not been explicitly stated that he is immortal. While he has survived numerous deadly situations and attempts on his life, it is unclear if he is truly immortal or if there are any weaknesses or limitations to his durability. The extent of his immortality, if any, has not been fully explored in the series. **

The question of whether consciousness is immortal is a complex and philosophical one. Many belief systems and spiritual traditions posit the idea of an immortal consciousness or soul that transcends physical death. However, from a scientific and empirical perspective, there is currently no evidence to support the idea of an immortal consciousness. The nature of consciousness and its relationship to the physical body and brain is still not fully understood, and therefore the question of its immortality remains a matter of belief and speculation rather than scientific fact. **

No, Nanno is not immortal. Nanno is a fictional character from the Thai television series "Girl from Nowhere." While she possesses supernatural abilities and seems to have an otherworldly presence, there is no indication in the show that she is immortal. Nanno's character is shrouded in mystery, and her origins and true nature are never fully explained, adding to her enigmatic and intriguing persona. **

Nezuko from the anime Demon Slayer: Kimetsu no Yaiba is not immortal, but she does possess some supernatural abilities due to being turned into a demon. While she does not age and has rapid regenerative abilities, she can still be killed by a demon slayer using specific techniques and weapons. Additionally, her brother Tanjiro is on a quest to find a cure for her demon condition, which suggests that she is not truly immortal. **

As of now, there is no scientific evidence to support the idea that humans are immortal. While advancements in medical technology and understanding of aging may extend human lifespan, there is no indication that immortality is achievable. The human body is subject to aging, disease, and eventual death, making immortality unlikely. Additionally, the concept of immortality is often considered a philosophical or spiritual question, and beliefs about the afterlife or existence beyond the physical body vary among different cultures and religions. **

No, trees are not immortal. While some trees can live for thousands of years, eventually they will die. Factors such as disease, environmental changes, and human intervention can all contribute to the eventual death of a tree. However, some species of trees have incredibly long lifespans and can live for many centuries. **