Twitch Global Emote

VoHiYo is a friendly 'hi' that has been in Twitch chat since January 2016. TwitchCon listed it among the ways to greet people: 'However you say hello to your favorite Twitch Partner in chat: Hi, VoHiYo, hola, HeyGuys.' Twitch ranked it 20th in its Top Global Emotes of 2017, and its emote guidelines give VoHiYo a special status: channel emotes may not be based on global emotes, except for 'Kappa and VoHiYo derivatives'.

Twitch uses it as a greeting itself. In July 2017 it introduced a different emote with 'Say VoHiYo to our newest global emote. @Crunchyroll's mascot, Hime is available for a limited time'. That newer emote is TPcrunchyroll.