With Telestale development hampered by a mana-leakage problem, Eru stays sharp by pivoting to other projects, like his Silhouette Gear. In a backyard presumably owned by someone they know, Eru demonstrates the mobility potential of a Gear armed with a grappling hook, as well as the destructive power of the siege weapon attachment, which blows holes in a perfectly good wall for no good reason! Eru even all but admits to Addy that he just came up with these improvements for fun, not for a specific purpose.
Addy and Kid decide to inform their father of Eru’s rapid progress, and word gets to Marquis Dixgard, who sends his knights of the Order of the Scarlet Rabbit to escort Eru and the new units to Fort Casadesus for evaluation. On the way, they’re attacked by Giant wormlike Demon Beasts, but Eru makes quick work of them between all the gadgets he has on his person and the Telestale Knight Runners.
Eru ends up staying behind with the Marquis, who seems like an imperious, possibly dangerous figure. And while he’s suspicious about whether Eru is really a little kid (and he’s right, he’s not, at least not mentally), Marquis is eventually convinced beyond all doubt that Eru is merely an extremely talented and driven young man with a thirst for constant improvement in technology. Dixgard can relate: he used to be like Eru…he just never soared as high.
Not only that, but Eru doesn’t seem angry in the least that the Marquis is taking over the project; after all, Telestale is only one of many ambitious projects Eru has lined up in the future. Whether he completes those projects unfettered by outside forces remains to be seen, as we see the Order of the Bronze Fang on the margins of this episode, and their purple-cloaked female leader is itching to start a war, armed with special Silhouette Knights of her own.