[Linda initially goes to recoil - honestly, she doesn't like anyone touching them except for Masaomi. But... with a little nod from her trainer she complies, though she's clearly not fond of the idea.
Though Masaomi can't know it, the reason for this development is simple, though built into how Linda was trained - precise electrical control as a pichu and later a lot of emphasis on specialized moves, some of which are even reaching for a pikachu's arsenal (like aqua tail) meant that the full potential of her ability to output large electrical currents was never really realized, she didn't train herself to store large amounts. ...Though admittedly, the Malnosso pushing the both of them to their limits in this regard during that kidnapping didn't help matters]
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Though Masaomi can't know it, the reason for this development is simple, though built into how Linda was trained - precise electrical control as a pichu and later a lot of emphasis on specialized moves, some of which are even reaching for a pikachu's arsenal (like aqua tail) meant that the full potential of her ability to output large electrical currents was never really realized, she didn't train herself to store large amounts. ...Though admittedly, the Malnosso pushing the both of them to their limits in this regard during that kidnapping didn't help matters]