When it comes to four-star support units in Genshin Impact, rarely is Sucrose a bad idea for the team. She's a free-to-play Kazuha or Venti for those without them. Her crowd control and EM buff are extremely valuable for teams focused on creating reactions. She's one of Genshin Impact's best four-stars in the game, on par with units like Xingqiu and Bennett in terms of utility.