Who did Floki betray?

Could you please elaborate on the question, "Who did Floki betray?"? It seems to refer to a specific character or event, but without further context, it's challenging to provide a detailed response. Is Floki a figure from a historical event, a character in a literary work, or perhaps a person from popular culture? Understanding the source and context of this question would greatly assist in formulating an accurate and informative answer. Additionally, if there are any specific details or aspects of Floki's betrayal that you're interested in exploring, please let me know, and I'll do my best to address them. Thank you for clarifying.