Sergey continues to talk to Lea throughout the game, unlocking more words, helping her situation to remain unnoticed, and trying to help her regain her memories.
Sergey has made no physical appearances to date. All of his interactions in the game have been long-distance, with him talking to Carla and Jet via hidden earpieces. He also talks directly to Lea, and his avatar implies that she can see a screen view of him. A similar conversation occurred between [[Shizuka]] and [[Satoshi's Captor]] in the prologue, making it possible that this is a hidden feature in all avatars.
File:sergey.png|Sergey's in-game portrait
File:sergey-old.png|A (possibly outdated) unobstructed portrait