In The Witcher Season 4 will Geralt and Ciri share scenes together?
No, in The Witcher Season 4 Ciri and Geralt won not share any scenes together. This results from Henry Cavill leaving the part of Geralt and Liam Hemsworth filling it. Playing Ciri, Freya Allan has confirmed that neither she nor Liam Hemsworth have shot any scenes together and that Ciri is following her own road in Season 4.
The Witcher Season 4's Ciri's plot is what?
Ciri will be on her own in Season 4 and adopting a new criminal way of life with The Rats on street gangs. She left with them in the Season 3 Part 2 finale and will be trying to forget about her past life with Geralt. In this next stage of her life, she will be going by Falka.
The Witcher Season 4 will feature a Geralt by Willliam Hemsworth.
Indeed, The Witcher Season 4's Geralt Of Rivia will be Liam Hemsworth. Although Geralt and Ciri won't have scenes together, Hemsworth will be filling in for Henry Cavill for the next run of the show.
How did Freya Allan respond to Liam Hemsworth assuming Geralt's role?
Freya Allan said that although Liam Hemsworth is a "very nice guy" she has not seen any of his work as Geralt. This suggests that in The Witcher Season 4 they have not recorded any sequences together.
Fourth season of The Witcher is the last one.
No, fourth season of The Witcher is not the last one. Considered the penultimate season, it follows that one more season will follow it. Though they won't be on the screen in Season 4, there are still more tales to be revealed for Ciri and Geralt.