Looking at ほしうらない and けつえきがた and how it relates to personality, I don’t think that they have anything to do with each other. They just make all the description very vague that can apply to everyone. I personally don’t believe in these kind of things because I feel that my うらない is pretty good so I don’t need external factors to change my luck. Whether it be good or bad. I have never been judged/discriminated by my 血液型 or 星占い because I feel like that is a more eastern kind of culture, so it didn’t make me feel any kind of way. These fortunes are popular because there is some kind of gacha to it which eastern countries enjoy. You can obtain 大吉, 中吉, 小吉, and 凶. Which all vary in how good the luck is. If you get 凶 which is the worst luck, you can tie it on a special rope as high as you can so the sun can burn it away. It’s a Japanese culture where if you get bad luck you want it to get burnt away, so you can have good luck again.