Life is so normal and common and usual and boring and natural and regular and typical and routine and commonplace and conventional and not special at all. Except apparently your life has been opposite day forever. Duh.
Two Atems. Yep. That's how things go. It's taken a long time, years probably, for them both to settle down, shut up, and accept each other's presence. Finally they have and usually they don't fight much anymore. They'll still fight over the name, though. And boy do they know how to fight.
Your life must be so hard, having two Atems all to yourself. So hard.
The one still draped in leather and chains and the other (while being barred from wearing Egyptian robes because there doesn't need to be more attention geared towards the oddness that is this) wears looser and lighter colored clothing. They're both different and independent from each other, yet some traits just can't be overwritten.
They function well on their own and somehow have become inseparable over the time it took to stop growling at each other every two seconds. Inseparable and different except when it comes to you, of course. Having two Atems all to yourself. How sad for you.
Today they've decided they're bored. And so they want to play with you instead. Your life must suck.