The Second Coming(Or SC as we will refer to them) is the product of the animator, Alan Becker who, unlike their predecessors, managed to befriend the animator rather than fight him. 

Being the product of the animator, my idea for SC’s voice is that it sounds the same as or similar to Alan Becker’s voice, except more energetic. Here is one of Alan Becker’s videos where he speaks more: https://www.youtube.com/watch?v=F3-hftG5J2g&t=711s Of course, it doesn’t have to be exactly the same as his voice, just have it be a similar pitch but energetic(And energetic doesn’t mean dragon ball z energetic, just casual energetic).