https://www.reddit.com/r/Genshin_Impact/comments/j6wez0/psa_characters_hidden_bonus_when_ascending/

when ascending, 5-star character has 20% more bonus than 4-star character of the same type. However, traveler is considered a 4-star character in term of ascending bonus

ATK: Traveler, Fischl, Chongyun중운, Xingqiu행추, Amber

Energy recharge rate: Mona, Bennet, Kaeya, Venti

Physical damage bonus: Razor

Elemental damage bonus: Sucrose (Anemo)설탕, Ningguang (Geo)응광, Beidou (Eletro)북두, Klee (Pyro)

Elemental Mastery: Lisa, Xiangling향릉

Crit rate: Diluc

Crit damage: Keqing각청

Heal bonus: Jean, Qiqi치치

DEF: Noelle

HP: Barbara