Sad string music and piano, oboe How about winter and ice expressions, endings, sadness, beautiful scenery, sad scenes, tragic developments, etc.

Oriental mysterious Piano and Glocken. Recommended for use in Japanese gardens, samurai, historical drama, oriental, Edo period, oriental scenery, mysterious scenes, reminiscences, speculations, and loneliness.

Mysterious Vibraphone and string music. Use acoustic and some hammered dulcimer. How about ancient civilizations and ruins, O-parts, game puzzles, mysteries, wonders, mysteries, mysterious scenes, unexplored scenes, world heritage scenes, etc.