Just a little thing that I thought was interesting, is that the record lab will not give you the master flag until all the relics are actually mastered.

When LOTR gave me Minfilia's LMR I was weirded out that I didn't have a master flag on her even though I had all her relics now.
Sure enough all 4 relics on her screen have an acquired flag but the master flag isn't coming up because she hasn't mastered the LMR yet.

Mostly just an interesting quirk of programming, since the Record Lab doesn't much care about if you have mastered the relic in most cases, but if one person grabbing stuff for a waifu while drunk, takes a second to check for the acquired flag, when they are trying to get the master flag for their special person saves some lenses, I will have done a good thing.