“…Our resulting four concepts are ((1) a human tele-assistant from the service provider, (2) a hologram, (3) a robot, and (4) a chat (bot) communicating with passengers through the app or a screen integrated into the seats, see Figure 1), and have been evaluated during our study. As we aimed to take the concept of the digital companion [37] to a different level, we also explored what roles, characteristics, and personalities a digital companion should represent from a user perspective and investigated them in an online questionnaire. Thereby, we were guided by the design space that Bouquet et al [47] propose for assistants in video games, which emphasizes the importance of their behavior, personality, and relation to the player.…”