Bunker Kids, the operator of AI character chat service Whif, said on Monday it raised 15 billion won in a Series A round. Investors included Kolon Investment, Kakao Ventures and Mirae Asset Capital, among others. The company said Whif users spend an average of 217 minutes a day. It said about 40 percent of revenue comes from overseas and it aims to lift that share to more than 60 percent by year-end.