Clippy, the animated paper clip that annoyed Microsoft Office users nearly three decades ago, might have just been ahead of its time. Microsoft introduced a new artificial intelligence character called Mico (pronounced MEE-koh) on Thursday, a floating cartoon face shaped like a blob or flame that would embody the software giant’s Copilot virtual assistant and marked the latest attempt by tech companies to imbue their AI chatbots with more of a personality. Copilot’s new emoji-like exterior comes...