Molly and Luna have bonded a lot since Luna passed away. Not that they weren't close before, but now they're total BFF's. I'm not surprised by this, but am sort of surprised that the bigger and older Molly gets, the more Lucy loves her. Usually adult cats are less patient once their kitten buddies grow up. Lucy did the reverse. They really started bonding once Molly was big enough to wrestle with Lucy, and now that Molly is bigger than Lucy it's just a total lovefest. They wrestle, but the main goal seems to be to pin the other one down and lick their ears. Sometimes they skip the wrestling and just groom each other. It's cute, except when they wake me up in the middle of the night.
It is funny - between the two of them they have most of the traits and quirks of their predecessors, Luna and Rugrat, but it's not a straight Luna-to-Lucy and Rugrat-to-Molly distribution. Lucy's my quirky one-person alpha cat, as Luna was, but she is also my little hyper cat, like Rugrat. Molly's my sweet cuddly talkative Maine Coon, as Rugrat was, but she is also my mellow confident big cat, as Luna was.