She founded Faithful Fish, a clothing line that has made her a success at age 20, but brand loyalty is not the basis of Chelsea Eubank’s latest crusade. She wants Christian teenagers to set aside certain days to attend school in clothing that shows what they believe – in a gentle, nonprovocative way. That’s why she held this Marietta get-together recently. Many credit Eubank with making Christian clothing more stylish and relevant to youngsters.