A sceptic at heart, she doesn't believe in dragon nor Railway Engines that talk. Idris was scared of being discovered an d sent to the zoo, but when she talked to Jones the Steam about Dragons, as a result of his inability to lie he told her everything about Idris and asked Ivor to confirm what he'd said. Ivor didn't respond, after repeated tries, so Mrs Griffiths concluded Jones the Steam was insane.