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Regulus (MDA-21) is a limited time CHUNITHM Collaboration Partner in Arcaea. She was available to obtain from May 23rd, 2019 to June 20th, 2019.

Awakening

Regulus (MDA-21) can be awakened at Level 20 by consuming:

  • 15 CHUNITHM Cores.


Stats by Level

LEVEL 1 2 3 4 5 6 7 8 9 10
FRAG 50 50 50 50 50 51 52 54 56 58
STEP 69 69 69 69 70 71 73 75 78 81
OVER 44 44 44 44 44 45 47 49 51 55
LEVEL 11 12 13 14 15 16 17 18 19 20
FRAG 61 64 66 67 69 69 70 70 70 70
STEP 85 89 92 94 95 96 97 97 97 98
OVER 58 62 64 66 68 69 69 69 69 70
LEVEL 21 22 23 24 25 26 27 28 29 30
FRAG 71 72 73 74 75 76 77 78 79 80
STEP 99 100 101 102 103 104 105 106 107 108
OVER 71 72 73 74 75 76 77 78 79 80

Notes

Regulus is heavily focused on STEP, however her maximum FRAG stat reaches baseline level. She has a very high stat sum of 188.

  • Her maximum FRAG stat translates to a 1.60x fragment multiplier.
  • Her maximum STEP stat translates to a 2.16x step multiplier for world mode.
  • Her maximum OVER stat translates to a 2.16x progression multiplier for the Lost Chapter of World Mode.

She currently has the second highest maximum STEP count of any partner, surpassing Ilith by 3 STEP, and Tairitsu (Grievous Lady) by 6. Compared to Ilith and Tairitsu (Grievous Lady), she can overall give up to 2 more and 4 more steps respectively in world mode, which will accumulate over time and can definitely save some plays and extra energy usage.

This is all however countered by the fact that she is event exclusive, and requires 15 CHUNITHM cores, or equivalent to completing an entire map in said event. As there are no plans or patterns to return a collaboration partner, the least a player can do is wait for Ilith to return or use Tairitsu (Grievous Lady), which are still very good in their own rights.

Trivia

  • Regulus is named after a quadruple star system in the Leo constellation.
Partners
Starting Partners HikariTairitsu
Story Partners Tairitsu (Axium)Tairitsu (Grievous Lady)Hikari (Zero)Hikari (Fracture)Tairitsu (Tempest)
Side Story Partners KouLetheEtoLunaSayaKanae
Collaboration Partners SapphireHikari & FisicaTairitsu & TrinHikari & SeineTairitsu (Grievous Lady) & Chuni Penguin
Soundtrack Partners Hikari (Fantasia)Tairitsu (Sonata)
Limited-Time Partners StellaIlithShirabeHikari (Summer)Tairitsu (Summer)AyuEto & LunaYumeNono ShibusawaHaruna MishimaRegulus (MDA-21)Pandora Nemesis (MTA-XXX)Chuni PenguinSiaDORO*C
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