2) The only real restriction is that these two characters - in the same cast and played by the same person - would have minimal or only background interactions with one another. They could not be reliant on or directly involved with each other.
(For example: Someone playing both Lunafreya and Ravus wouldn't be allowed since they are siblings and would likely want to communicate regularly and directly, but someone playing both Lunafreya and Aranea would be fine since they don't interact at all that is seen in canon and wouldn't have much reason to in game either.)
no subject
2) The only real restriction is that these two characters - in the same cast and played by the same person - would have minimal or only background interactions with one another. They could not be reliant on or directly involved with each other.
(For example: Someone playing both Lunafreya and Ravus wouldn't be allowed since they are siblings and would likely want to communicate regularly and directly, but someone playing both Lunafreya and Aranea would be fine since they don't interact at all that is seen in canon and wouldn't have much reason to in game either.)