Gacha rules explanation
Some people got mislead by other post and think what 25:75 for characters and 50:50 for weapons is rule for every 5* drop, which is wrong.
How system actually works: there is 100% chance for limited 5* character on 100th pull and 100% chance for limited 5* weapon on 80th pull.
25:75 and 50:50 only works for all the other 5* drops what you get BEFORE that (100th and 80th pull).
Losing 25:75 or 50:50 do not make next 5* drop to be limited and do not reset pity
the "25:75" rule is actually not mentioned, it's just logical assumption, cuz it's said what limited 5* character shares chance with other standard characters (so 1:3 for now with Rex, Gratia and smol girl being only std 5* characters). It means if in future they add another character in std banner the chances will change to 20:80 and so on, but they may never add anyone to std pull.
While weapon rules DO mention what there is 50:50 system, 50 for limited weapon and 50 for others
Also soft pity is not mentioned, but hoyo also don't have it in their rules, so we need to see if it exists on practice with global statistics in future