Jack-O' is one of the three servants of That Man, alongside Raven and I-No. Her past is shrouded in mystery, and her own memories are vague. Due to being awakened in an incomplete state her memories and personality data are fragmented and unstable. This instability has resulted in the side-effect of a split personality of sorts: That of a cool and collected adult woman, and a child-like one that is playful and cheerful, with her voice and mannerisms changing accordingly. As her awakening remains incomplete, she cannot function without her mask and candy. 

Sin Kiske, the forbidden child of a human and a magically crafted biological weapon called a Gear, lives in a world where magic has replaced science, and scars from the Gear rebellion remain. Attending his parents’ taboo-breaking wedding, he encounters a mysterious girl with deep hatred for Gears, and their fateful meeting threatens to upend the world once again.<br><br>
(Source: Crunchyroll)

[Profile](https://mausu.net/talent/igarashi-hiromi.html) | [Blog](http://ameblo.jp/yukinko-magic) | [Twitter](https://twitter.com/HiRoMi_ig) | [Wiki (en)](https://en.wikipedia.org/wiki/Hiromi_Igarashi) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E4%BA%94%E5%8D%81%E5%B5%90%E8%A3%95%E7%BE%8E)

She is affiliated with Mausu Promotion. 

**Non anime roles:**
- [Reimu Hakurei](https://anilist.co/character/5443) - Muse Dash (VG)
- Sonya - Memento Mori (VG)
- Sunohara Kokona - Blue Archive (VG)
- Volume - Goddess of Victory: Nikke (VG)

Jack-O' Valentine