How many mystic arte have hisui (jadeite) hearts 1 as the character?
CREATE TABLE "series_characters" (
  "character" text,
  "game" text,
  "platform" text,
  "status" text,
  "mystic_arte" text,
  "character_voice" text
);
SELECT COUNT("mystic_arte") FROM "series_characters" WHERE "character"='Hisui (Jadeite) Hearts 1';