Wonderful +38:

Elincia, Ilyana, and Astrid from Fire Emblem Path of Radiance, Ingrid, Petra, Dimitri and Edelgard from Fire Emblem Three Houses, and Hortensia and Citrinne from Fire Emblem Engage are all worthy inclusions into my hall of fame.  Unfortunately this doesn't use up any unused songs because there are plenty of Fire Emblem songs that are rated 3-star or above that can soak up all these inclusions.

Zeta and Djeeta are great characters from Granblue Fantasy, but again I have plenty of Granblue songs for the likes of them.

Guyver's heroine, Mizuki, is pretty damn hot, so she'll do.  But that only nets me one song.

Sicily from Kenja no Mago is beautiful, loving and strong, a pretty good trifecta.  Plus it's a series worth honoring.  That nets me one song.

Yurie from Teen Web Novelist is a Girl Magnet is beautiful, loving and talented, another pretty good trifecta.  She's also my dream girl who actually respects writers due to how good their works are, which you'd think would be a thing.  That nets me one song.

I demoted the FF7 song Reunion to 4-star, promoting Before I Rise to 5-star in its place.  This meant Harukaze no longer needed to have Reunion as her theme, so I gave her Dusky A instead, a much better fit for her.  That netted me one song.

The twins from Demons Crest, Yuuma and Sawa, are smart, Yuuma is cool and Sawa is gorgeous, so they'll do.  That nets me two songs.

Milk and Ciel were fairies transformed into Precure which have been in '100 Waifus' before, so it makes sense to bring them back into the fold.  That nets me two songs.  Ichika was also in '100 Waifus' as the head Precure of Kira Kira, so that's another song.

Kaname is the most sensible character in Tonikaku Kawaii and quite pretty and considerate, so that nets me a song.

Akane from Class no Daikirai na Joshi to Kekkon suru Koto ni Natta is adorable.  That's one song.

Saten is the least valuable heroine of Railgun, but Railgun is a very good show so it makes sense to bring her into the fold at last. She took level 5 judglight from Anji because Railgun characters deserve Railgun songs.  Then I gave Anji a new song, Mechanical Kingdom, so that's one song down.

But the only real way to chip into my unused songs is to honor characters from my own works, which don't already have songs made for them -- Nuen, Glen (Shade) and Rain (Sunbeam) from The Twin Spires, Marcellus, Marcus and Jania from Illyria, Gust, Gale, Laura and Vistan from Wind, Hei Ming Jong, Fae Lao, Gai Yi and Yue Fang Jong from The Emperor's Son, and Isolde and Sacripant from The Greatest Vision.  

That gets my unused song count down to 20, and finishes off FF12, FF10, FF10-2, FF Tactics Advanced, Warlords 3 and Senren * Banka while I'm at it.  In fact, that now finishes off the entire FF franchise as a whole.  Hallelujah!