[The heroine is immortal + no cp (because of the life span theory) + group portrait + growth type, it should be.
"Si Yao, female, 16 years old, almost a senior high school student, superpower level A."
"... What's there to ask?"
"Don't worry, listen to me. After three years of searching and organizing, we found that you are the founder of the 'Yuanwang' organization. You have the most powerful superpower team in thousands of years."
"The purpose of the organization is to protect the lives of all human beings, right?"
"..."
"Also, after searching ancient information, we discovered that you... Should be about three thousand years old this year. Moreover, you are the only bottomless pit of superpowers in all mankind, the 'Immortal Level'."
"What you said is correct, absolutely correct. What next?"
"... You can continue to go to school."
"?"
Intention: What is this