Warning! This article may contain spoilers for Loki. Read at your own risk!
In Loki Episode 4, The Nexus Event, Mobius returns with the arrest of his Loki and Sylvie. More than that, he finally learns that the Time Variance Authority has been feeding them lies and he suffered a great consequence for that. What happened to Mobius and what comes next for his character?
What Happened to Mobius in Loki?
Mobius is always skeptical. He always questions things and from the start, he had so much faith in Loki, and he knows when someone is lying or not. His relationship with Loki is more like a partner rather than an investigator focused on Loki himself, even when Loki explicitly said he doesn't do partners. The character of Owen Wilson has been betrayed more than once but he trusts again.
This is why, in Loki Episode 4, much to the shock and surprise of everyone, Mobius got pruned just as he and Loki are finally getting along together with a full-on trust and they are already on the same side.
Mobius have questions about the death of Hunter C-20 and he approached Ravonna Renslayer to give him answers, only to find out that she is already dead. Confused, he continuously asks her how and why, and being a person who's good in determining when one is lying, it is really shown in the face, tone, and gesture of Renslayer that she is.
Once Loki and Sylvie were in custody, he asks permission to Renslayer to interview Sylvie but she completely shuts Mobius down saying to "focus on your Loki" then afterward, he learns from Loki that the TVA is lying to them and that all of them have the lives of a regular person before becoming a TVA agent and a variant.
He did not believe it at first but when he switched his TemPad to Renslayer's, he found the video of C-20 confirming what Loki just said. He immediately got to Loki to confront him and hatch a plan. However, Loki was not informed that Mobius' part of the plan involves being pruned after Renslayer found out that the TemPad have been swapped.
What's Next for Mobius in Loki?
With the post-credits scene, we could easily deduce that Mobius may still be alive as people who are pruned don't get erased from existence. It merely teleports someone to another place and time. As Loki got pruned as well, it is highly possible that he will look for his friend Mobius in the world where all the pruned people go.
After all, they are good partners to each other, right?
Loki Episode 4 is currently on Disney+.