Every gacha game has ways to keep pulling repeat characters from feeling disappointing, and Genshin Impact's method is through its Constellation system. Every time a repeat character is pulled, the character will receive an unlockable bonus to their strength (up to 6 times). These bonuses and talents vary between every character in the game, and some Constellation talents are very strong.
For some Genshin Impact characters, their best Constellation talents vary on how soon they are obtainable. For example, Hu Tao's arguably best Constellation talent is her Constellation 1 (C1) talent, which causes her charged attacks to cost no stamina during the duration of her Elemental Skill. And while the rest of Hu Tao's Constellation talents are indeed strong, the one that benefits her own personal output the most is her C1 talent, meaning that Hu Tao shines at C1, and players that do not get more Constellation talents after C1 are not missing out on the biggest upgrade for the character, which makes Hu Tao easy to build.
Related: Genshin Impact Lore: Tale of the Five Kasen
However, there are some characters who shine best at their full potential, and that would be when their Constellation 6 (C6) talent is unlocked in Genshin Impact. This is due to either several of a character's Constellation talents being strong or that their C6 talent is so strong that it takes the character up to a new level. Some C6 talents can change a character's playstyle completely, and others can simply greatly increase the character's damage capability. Some C6 talents are definitely stronger and stand out more than others, deserving special recognition for the extra diversity that it grants a character.
While not all of Xiao's Constellation talents are
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