Suggestions by @solshine

Victoria Park

as SCP-953 in The SCP Foundation

Te Ao O'Hinepehinga Rauna

as O5-9 (Ouroboros) in The SCP Foundation

Yandeh Sallah

as SCP-179 in The SCP Foundation

Logan Shroyer

as Adam Ivanov in The SCP Foundation

Teagan Croft

as SCP-166 in The SCP Foundation

Chloe Rose Robertson

as SCP-105 in The SCP Foundation

Yusuf Gatewood

as O5-12 (Ouroboros) in The SCP Foundation

Joseph Fiennes

as O5-6 (Ouroboros) in The SCP Foundation

Sarah Snook

as O5-7 (Ouroboros) in The SCP Foundation

Nikolaj Coster-Waldau

as Anthony Wright in The SCP Foundation

Alexa Demie

as Olivia Torres in The SCP Foundation