User blog comment:Servant of Evillious/Clockwork Lullaby Analysis/@comment-16798306-20130216031657/@comment-6192846-20130217125802

I discussed this with Jakeinc over chat once. I purposely ommitted mentioning Full Moon Laboratory. The way I see it, the difference in tone and timing between the Clockwork Lullaby series and this song convinces me they are different characters. I believe the character representing Rin is similar to Len representing the orphan of Kept Waiting for a Response, having no apparent connection to the rest of the series' characters represented by the same VOCALOID. I attribute this to mothy's implied preference for Rin and Len.

I also hold doubts about MOTHellY because GUMI is not credited whatsoever in the chorus. Mothy clearly has had an extensive amount of time put into thinking out this series, not including GUMI in a song where her character is supposed to be present is unlikely.

You may be right though. It is definitely possible. Same with MOTC singing the lullaby, that may be possible too. I can see it since she does sing it in Miniature Garden Girl to heal her own heart, although it merits wonder how she discovered that tune as well.