BookObservation Diary of a "Changed" Child
Observation Diary of a "Changed" Child is a 1★ material in Honkai: Star Rail — see how to get it, its use, and related items right below on this page.
Observation Diary of a "Changed" Child is a material ★1 in Honkai: Star Rail. This item is not currently used to level up any character or Light Cone.
Last updated: 30/07/2026
The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.
Read the full text
One of the pages belonging to "Observation Diary of a "Changed" Child". Read the full text in the Library.
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Stats
| Rarity | ★ |
| Type | Book |
Official names in every language
| Tiếng Việt | Nhật Ký Quan Sát Của Người Bạn Nhỏ (Đã Tha Hóa) |
| English | Observation Diary of a "Changed" Child |
| 日本語 | 子供（闇堕ち済み）の観察日記 |
| 한국어 | (흑화한) 조그만 친구의 관찰 일기 |
| 繁體中文 | 小朋友（已黑化）的觀察日記 |
Same-type items
FAQ
What is Observation Diary of a "Changed" Child?
One of the pages belonging to "Observation Diary of a "Changed" Child". Read the full text in the Library.
Where do you get Observation Diary of a "Changed" Child?
Official drop/source data for Observation Diary of a "Changed" Child isn't published yet — check back after the next data sync.
What type of item is Observation Diary of a "Changed" Child?
Observation Diary of a "Changed" Child is a 1★ material in Honkai: Star Rail, in the “Book” category.
What is Observation Diary of a "Changed" Child used for?
Observation Diary of a "Changed" Child currently isn't listed as required by any character ascension, Light Cone ascension, or crafting recipe in official data.