I don't think so.I think she's sanguine.
The one does not exclude the other
Note that I spoke of
occasional melancholic traits (about being separated from her family).
In spite of the fact that almost every LBT character lost at least some family member (though we don't know what happened to each of them or if the characters ever knew them) this is rarely mentioned throughout the sequels. Personally I consider it a good trait of Ruby's not to put forth an "out of sight out of mind" attitude towards her family.
And non-pure LBT fanfics as well. It depends on what style of fanfic one prefers to write.
I may still have a dream don't I?
After all there is non-pure stuff out there a plenty while pure LBT fanfiction are so rare that I think encouragement to write those is not out of place.