Now, the key here is to identify what the user needs. Since they mentioned a "helpful feature," they might want something like navigation, language support, character information, or maybe a way to track their reading progress. Let me consider the possible limitations of the current VK platform. For example, maybe the manga is in Russian, and the user wants translations. Or perhaps they need episode guides, episode numbers, or information about the source material.

Another thought: if the user is looking to understand the context better, a feature that provides summaries, character backgrounds, or explanations of the world before each chapter could be helpful. Also, perhaps a FAQ section or a glossary of terms specific to the Infernal Devices universe.

Also, considering user experience, maybe the VK manga isn't very organized, so a timeline or summary of the Infernal Devices manga could help users keep track. Or maybe a feature that compares the manga differences with the original books or other adaptations like the TV series "Shadowhunters" versus "The Witcher" or others, wait, no, "Infernal Devices" is part of the same universe as "Shadowhunters." Maybe cross-referencing with the TV show episodes?

Wait, the user might not be fluent in Russian, so maybe a feature that provides English subtitles or translations. VK does support Russian users, but international users might need translations. Alternatively, a way to switch between languages or access fan translations.

Also, considering that the Infernal Devices series has three books, and the manga might cover the same story or a different adaptation, a feature that aligns both the manga and the books' content could help users follow along. Maybe a side-by-side comparison or a timeline.

Wait, the user might be looking for something that helps them navigate the manga on VK, perhaps translating Russian text, since VK is a Russian site. If the manga is in Russian, having a translation feature or annotations could be important. Alternatively, organizing the chapters or episodes properly since sometimes translations aren't in order or are missing.