Spoiler
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In the novel, after they deal with the emperor, there’s a part where bits of the memory comes back and Duke Escra makes a call to Ravi, calling him brat or something (something he call Ravi back when he’s living with them), saying sorry for forgetting them and reminding him he is also his son. We also get to know Ravi’s biological dad (ghost mage) who is worst on my opinion for leaving his wife and son for his magic research right after Ravi was born.

Okay now my poor Ravi.. he must have like Duke Escra a lot back then.. to the point he already accepted him as his step father.. but *sigh* I can't blame duke escra since after he regain memory he also forgot the new one. Well, i really hope he'll remember about Ravi anyway... I hope so. BUT that's also not an excuse to act like a jerk consider you know Ravi have something to do with Camilla. Try to dig up more old man. (︶︿︶)