Instead of LB its future Chat Noir that deals with Blanc (an older Chat Noir from 10 years or so in the future, an alternative timeline where they had defeated Hawkmoth and Paris prospered and relished in their fiercely protected peace.)
Bunnix had made preparations to travel to the past, grab Minibug and bring her to the cataclysmic version where the world was no more, frozen in time, submerged in white and vacant of life.
But the older Chat Noir had rejected the idea, instead he proposed another one: he would go himself.
So he goes to the past, to a version of him he was terrified of, not because of Blanc's destructive powers but because of a version of him existed that had succumbed to darkness, that had allowed himself to go that far.
He knew the risks, he knew it could create a paradox, but it had to be him.
He couldnt allow his lady to confront that version of him, not again, not alone, not this time.
So he asked Bunnix to bring him to that timeline, to the world he knew was bathed in white and vacant of all life except the frozen one that was Blanc's.
After all, he knew himself the best.