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2 mischievous tiny little shunter diesels from the Arlesdale railway who are used for maintenance, construction, and shunting the coaches and hoppers into to place for the other engines whether it is in the yard or at the station and always cause mischief like put coaches in the wrong spot or hiding them from engines, or give the driver trouble starting them, or bumping the back of the steam engines and scurry away unless put in to place by the Sigrid of Arlesdale the other kinder diesel on the railway also their annoyance is how they got their names Blister #1 and Blister #2 they have even known to pull loads or passenger trains together if no other engine is available.

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