From 2010 onwards, some emoji character sets have been incorporated into Unicode, a standard system for indexing characters, which has allowed them to be used outside Japan and to be standardised across different operating systems.
Dipper is a 12-year-old (13-year-old by the end of the series) boy who, along with his twin sister Mabel, is sent to spend his summer vacation in his great uncle's tourist trap, The Mystery Shack. He endeavors to uncover the secrets of the fictional town of Gravity Falls and to find explanations for assorted strange situations.
Pherkad is indeed dimmer than Kochab, shining at third magnitude. The two other stars that complete the pattern of the bowl of the Little Dipper are of fourth and fifth magnitude, which means you may struggle to see them from a city or suburban setting.