Multiple Personalities Support Group
Dissociative identity disorder is a diagnosis described as the existence in an individual of two or more distinct identities or personalities, each with its own pattern of perceiving and interacting with the environment. At least two of these personalities are considered to routinely take control of the individual's behavior, and there is also some associated memory loss,...

ideally, you will be able to ask the alter yourself as you begin to build connections with different parts in your system...
there are different types of alters...some are like fragments and not fully developed so the answer to your question will depend on other factors...
ultimately it comes down to getting to know and understand how your system is built or designed....how developed or how much depth each alter has
Have you tried different methods to talk to jace? I found Fiona responds more through writing of poetry - we’ll have full on conversations through verse.