To-do list:
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Chapters
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- [ ] onik_009.txt
- [ ] onik_009_02.txt
- [ ] onik_010.txt
- [ ] onik_011.txt
- [ ] onik_012.txt
- [ ] onik_013.txt
- [ ] onik_014.txt
- [ ] onik_014_02.txt
- [ ] Test onik-015 -> onik_015_03
  - [ ] onik_015
  - [x] onik_015_02
  - [x] onik_015_03

Other
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- [x] Find the missing voice file for onik_015_03.txt, [line 68](https://github.com/higurashi-mod/scripts/blob/master/Update/onik_015_03.txt#L68)
- [x] Unify sound files for onik_015_02.txt
  - [x] S01/02/120200482|S01/03/120300213	「「あはははははははははははははははははははははははははははははははは…」」 [line 996/997](https://github.com/higurashi-mod/scripts/blob/master/Update/onik_015_02.txt#L996)
  - [x] S01/02/120200483|S01/03/120300214	「「あははははははははははははははははははははははは」」 [line 1019/1020](https://github.com/higurashi-mod/scripts/blob/master/Update/onik_015_02.txt#L1019)
  - [x] S01/02/120200491|S01/03/120300218	「「あははははははははははははははははははははははははははは」」 [line 1132/1133](https://github.com/higurashi-mod/scripts/blob/master/Update/onik_015_02.txt#L1132)
  - [x] S01/02/120200492|S01/03/120300219	「「あははははははははははははははははははははははははははは」」 [line 1197/1198](https://github.com/higurashi-mod/scripts/blob/master/Update/onik_015_02.txt#L1197)