Maxperson
Morkus from Orkus
Agency only exists while you are there playing the character. You the player make the choices about what the character says and does. If you are absent, you are not available to have agency.But it is not your character. The player chooses how to play the character, not the DM. That is the basic premise of player agency.
It doesn't have to make sense to you, it has to make sense to them!