The advice that Lilia imparts to Silver might be infamous at the school: During the Firelit Sky event the members of the tour group assume that Lilia will be inviting Silver.
Cater says that Lilia loves spoiling Silver and is always taking it upon himself to teach Silver things. Trey responds, “True, but it feels like most of what he’s teaching him is utter nonsense…”
Other things Lilia has taught Silver include the requisites of being a perfect prince, such as joining a princess in song, having sparkling white teeth and riding a white horse. Lilia has also taught Silver that the secret to singing is to look at one’s own reflection in water (Idia is not convinced), which Silver says has helped him a lot.
Silver has also possibly adopted Lilia’s habit of silently appearing behind people without their knowing.
Other advice from Lilia to Silver includes “we should respect each other’s beliefs,” “an aerial toss is the best way to honor bravery,” “the moment you think you’ve won is the moment you’re the most vulnerable,” and “as long as you survive, you can worry about the rest later.”
This last point is emphasized during Book 7 when Silver descends into the darkness of Lilia’s dream, but finds that his body keeps fighting, “like it’s trying to survive,” because Lilia taught him to survive no matter what.
At his lowest point Silver hears Lilia’s voice in the darkness telling him “It’s okay to turn tail and flee. It’s okay to use dirty tricks that break the rules. But you must never, ever give up on living.”
Silver quotes Lilia back to himself during his dream when Lilia tries to sacrifice himself and have Silver save Malleus in his stead, and Silver refuses.
Twisted Wonderland Reference Note 