He slashed that one guy from the prologue, and kicked some assassin? That's pretty much it. What's with the Look at this scary and badass DAD character build-up, if you never make any appropriately badass scenes for him anyway?

-Hey Khalid, you're a Paladin from this moment, now go fetch me some of those sweet MC's blood, who is also the daughter of the grand duke and would be escorted heavily in her territory and would cause a war I didn't need if found out.

-Huh? The MC might've been my daughter? Let's panically go to her house, even though her father and I are pretty much hostile to each other, and let's not forget to behave suspiciously and ask him some suspicious questions too.

Little did they know MC is Rabies' illegitimate half-sister & thus also fits the bloodline criteria

First. I am expecting the so called intelligent brother of his, let's call him the name Dennis, to tell his father about what he found out - MC being a Saintess. Being an intelligent person, he should have known the consequences and the dire situation her sister is in. But instead of telling his father, he kept it to himself! Oh God I wish this intelligent person discussed the plans his sister will have or what are the strategies they gonna make to protect her sister or how to destroy the temple. But, I haven't read that far. All I knew is that 2 years have passed but no strategies mentioned, I guess that is a secret for now. But really? When will they gonna tell it to their father this very important matter? They know he is powerful, why aren't they telling him? The current Saint already died but he still does not know anything. How is he supposed to prepare or plan ahead if he doesn't know anything. Anyway, it's okay since it is the protagonist, even if she make the s*upidest mistake, she'll make it out, and will somehow become intelligent, awesome, amazing for being able to overcome that mistake she made.

Second. WTF is the MC doing, she knows it is over for her once the temple discover her identity. Why isn't she asking for help?? The two brother already know who she is, why is she not telling her father?? Is she going to surprised him?? Like wtf! "Omg, my adorable, amazing, cute, and best baby/daughter is actually a saint, that is so like her." Is that what is she hoping, Ik it is not. But this is frustrating me. As a person who have suffered for how many lifetimes, I am expecting her to be overly cautious regarding this matter. But she is too laid back, continuing her daily life. I am aware she is doing some stuff so that she has something to depend on. BUt, firstg of all, she knows it that is her father that is most dependable. I am aghast how laidback she is not telling him this, If one day she is discovered, what did she think her father will do? Ah, right. She has her brothers to tell his father that.

Third. The current Saintess is dying. She knows that, they actually met. How come she does not try to cure her? Considering that her living is important to her as it will reveal her identity. Why she doesn't try to cure her or giver her strength or divine power so that she live for more years to come? The point is she should have tried, but no. The author doesn't have that in mind, she didn't even mention that a divine power won't work to cure another saintess. But the Saintess herself was able to at least cleanse herself after knowing she is being poisoned. Hah! Curing or giving the current Saintess strength or divine power should have crossed her mind for her to have a few years to prepare. Lah!