Headscratchers / Digimon Story: Cyber Sleuth - Hacker's Memory

• Why is Yu even an option in the earliest domination battles? It makes zero sense from a story perspective; Early on Yu makes it clear he does not like hackers, and Keisuke explicitly left Yu behind at the start of the story to avoid endangering Yu. Keisuke even avoids keeping Yu up to date about what’s happening for that reason. Why would Keisuke even consider for a second to ask Yu, someone he’s trying to AVOID involving and to his knowledge has little to no hacking experience, to help in a hacker battle?