Finnish musician known for his work as a bassist, vocalist, and songwriter in progressive and heavy rock. Best recognized for his tenure in Nightwish, he has also been active in various other projects, including Tarot and Northern Kings. His solo work blends elements of progressive rock, folk, and heavy music, often featuring dynamic arrangements and introspective themes. With a distinctive voice and a broad musical approach, his contributions have spanned symphonic, hard rock, and progressive styles, making him a versatile figure in the genre.