Complex sentence: In his Ace form, Leangle is the strongest rider in the series.Although first afraid of the dark when fighting the mole undead, Mutsuki went over his fear when he saw the smiles on the peoples' face he rescued.
Split into simpler sentences: In his Ace form, Leangle is the strongest rider in the series. Although initially afraid of the dark when fighting the Mole Undead, Mutsuki overcame his fear when he saw the smiles on the peoples' faces he rescued.