this makes me think that, outside of Renko hugging merry because of Merry being a bit more cold, i also imagine that Renko hugging Merry is neither her way of a) joining merry into her dreamland's adventures. (since Renko would feel interest of exploring merry's dreams); b) stoping Merry from leaving her into her dreams (if Merry somehow vanishes from the outside world into her dreams, but as a FULL person (not just spiritually like how Sumireko goes into gensokyo); or c) Renko probably mistook Merry as something from her (renko's) dreams and her hugging is kinda intetional, as Renko was still functioning but yet asleep... (i somehow like the first and second option though...)