Complex sentence: He is insecure and shy at first, having trouble controlling his camouflage abilities, but soon becomes more ambitious, confident, and short-tempered after joining Roar Omega Roar.
Split into simpler sentences: He is insecure and shy at first, having trouble controlling his camouflage abilities. Randall soon becomes more ambitious, confident, and short-tempered after joining Roar Omega Roar.