101Leafy researched the games.
Grt Purple Emperor I

Water-elemental giant pincer Bow. The large purple frame mirrors a butterfly's wing.
Plum Daimyo Hermitaur materials raise both the attack of the normal Oobasami and the power of its water element. When a hunter draws this bow wide, it is said to look like a blue butterfly spreading its wings, which has also raised its artistic value.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 174.
| Class | Bow |
|---|---|
| Rarity | 9 |
| Attack | 252 |
| Water | 190 |
| Slots | 1 |
| Table price | 52,000z |
Upgrades
| Upgraded from | Daimyo's Warbow IV |
|---|---|
| Upgrades into | GrtPurpleEmperor II |
Can also be made new at the smithy.
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 798.
Materials
PlumD.HermitrShl ×8, PlumD.HermitrClw ×3, HrdHermitaurClaw ×3, SpecGrnPlesioFn+ ×4