Stargazer looked down at Gentarou's hand blankly. Kokuwamon sent a message to Stargazer's D-Comm explaining what they had been talking about and what a handshake was. Stargazer checked its D-Comm after it vibrated, and then, now having an idea of what was going on, finally took Gentarou's hand. It's grip was very firm, but it was intentionally being careful not to put too much force into the shake and crush Gentarou's hand or break his arm.