EAST GRAND FORKS — Senior Ella Arntson has run for Riverside Christian since the program's inception six years ago. Ella's younger sister, Emelia, is a freshman. Emelia doesn't know Riverside Christian cross country without Ella. "It's going to be so weird," Emelia said. "It just will not be the same without her. ... She's such a big leader in our group and an amazing running buddy, too. It's just going to be so weird without her." The sisters, …