>>41090246HEADCANON: Since twitch rules are strict, girls (especially powerful ones ) have to seal their negative emotions. Their companions/mascots are embodiment of that which works out because they are silent BUT girls can hear them.
They have all kind of negative emotes but main ones are:
Goro: racism
Bradley: homophobia
Bubi: political autism (makes sense since he is a politician)
More headcannon, pure speculation:
Tenki: Love and affection, Vei is a reverse case