BRICS is Russia wishing that China (much less Brazil, Egypt, Ethiopia, India, Indonesia, South Africa, and the United Arab Emirates) were aligned to its interests.
A more accurate description of the way the world is trending:
US / UK / Europe / Japan / South Korea (still tied by defense, if push really comes to shove) vs Russia vs China vs Non-Aligned Nations (India, Indonesia, Egypt, Bangladesh, Pakistan, Ethiopia, Nigeria, etc.)
And historically (1960s), in a multi-polar world, middle powers are best served by being ambiguously aligned to force advantageous courting by major powers.
Then have a look who is supporting whom with weapons, which militaries are running maneuvers together, who is cooperating - or not cooperating - economically, who is visiting each others' summits, etc.
It's true that many countries are trying to have relationship with both sides or are trying to keep all options open - which is the most reasonable strategy, I think - but there are still two power centers emerging between which those countries are aligning themselves.
Well, China, Russia, Iran, and North Korea seem to have a (fairly loose) "alliance of convenience" at the moment. "The enemy of my enemy", more or less.
If this spreads into a broader conflict, it remains to be seen whether Europe sticks tightly with that block. They certainly won’t align with Russia, but they may be tied so closely to China economically that they can’t afford to be dragged into a direct conflict with them. I could see a situation where they try to remain non—aligned.