Eto & Luna is one of the Partners in Arcaea. They were obtainable during the Empire of Winter event in a World Mode map in Chapter 0. They were available for a limited time from December 23, 2018 to December 31, 2018.



Main Article: Eto, Luna


For the most part, their clothing has been changed to thicker-looking, frilly and winter themed clothing with Eto's colors in particular being white instead of her original blue. Their beret ornaments have changed to their respective representations of their namesake with bow ties that are colored based on their beret's liner. They also wear mini-wings on the back waist, with Eto wearing bird wings and Luna wearing bat wings.

While Luna still has her rapier, Eto visibly hugs Kou's teddy bear.


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Stats by Level

LEVEL 1 2 3 4 5 6 7 8 9 10
FRAG 52 52 52 52 53 54 56 58 62 66
STEP 24 24 24 24 24 25 26 27 28 30
LEVEL 11 12 13 14 15 16 17 18 19 20
FRAG 71 75 79 81 83 84 85 85 85 86
STEP 33 35 36 37 38 39 39 39 39 40


Eto & Luna currently holds the highest FRAG stat for a support type partner, at 86.

  • Their maximum FRAG stat translate to 1.92x fragment multiplier.
  • Their maximum STEP stat translate to 0.80x step multiplier for world mode.

This makes them one of the most viable support-type partner for fragment farming, much suited for players who are not confident on clearing charts. However, this does come at a cost with their skill having reduced recollection rate per note, even if the player starts at 30%. As such, not getting LOSTs are still a priority – more so, in fact, due to their fragment farming potential.

Their step stat is perhaps one of the lowest STEP for a support-type partner, but as discussed in Hikari (Zero) the low STEP stat can be used for landing on a Stamina tile.


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  • Winter event launch celebration image by cierra.
Starting Partners HikariTairitsu
Story Partners Tairitsu (Axium)Tairitsu (Grievous Lady)Hikari (Zero)Hikari (Fracture)
Side Story Partners KouLetheEtoLunaSayaKanae
Collaboration Partners SapphireStellaHikari & FisicaTairitsu & TrinHikari & SeineTairitsu (Grievous Lady) & Chuni Penguin
Limited-Time Partners IlithShirabeHikari (Summer)Tairitsu (Summer)AyuEto & LunaYumeNono ShibusawaHaruna MishimaRegulus (MDA-21)Pandora Nemesis (MTA-XXX)Chuni Penguin
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