Rank 3: Ciri

Cirilla Fiona Elen Riannon, better known as Ciri, is the adopted daughter of Geralt and a so-called child of Elder Blood. She hails from a powerful bloodline that grants her extraordinary magical abilities. Above all, she possesses the power to travel between space and time, as well as between parallel worlds. This alone makes her one of the strongest individuals in The Witcher. Whole worlds could be conquered or destroyed through her power.
But that’s not all. In addition to her magical potential, Ciri was trained like a witcher in Kaer Morhen for many years. Although she never undergoes the herb trial through which witchers are normally mutated via a life-threatening process, she attained immense strength, endurance, and skill, becoming an excellent swordswoman. We will hopefully see what happens with Ciri as a witcher in The Witcher 4 soon.
Ciri combines the strength of a witcher with the ancient and powerful magic of Elder Blood and therefore deserves her place as the third most powerful character in The Witcher.