A bloodless coup or victory is one in which nobody is killed.
Reports from the area indicate that it was a bloodless coup...
The campaign would be short and relatively bloodless.
If you describe someone's face or skin as bloodless, you mean that it is very pale.
...her face grey and bloodless.
There is relatively little information about bloodless, maybe you can watch a bilingual story to relax your mood, I wish you a happy day!