101Leafy researched the games.
GrtPurpleEmperor II

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 | 300 |
| Water | 210 |
| Slots | 1 |
| Table price | 81,700z |
Upgrades
| Upgraded from | Grt Purple Emperor I |
|---|
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.