Many sources (eg this one) show the Mars Sample Return Earth Return Orbiter with both ion and chemical propulsion, and also state that it will be launched on an Ariane 6, but I can't find a clear statement of how they are being used, and whether aero-braking, or aero-capture at Mars plays any role.
So my question is what, in terms of orbits and propulsion, is the mission profile? Specifically: what orbit will the Ariane 6 deliver it to? How will it enter Mars orbit? and low Mars orbit? how will it leave Mars? will it decelerate at all on return to near-Earth space, or is it on a direct entry trajectory?