The way to divide 'fiction' into syllables is by listening to how it's pronounced. You'll find that it splits as 'fic-tion'. It's not too complicated once you get the hang of it.
Think of a simple action and its setting. Like 'A child runs. Through the meadow. Seventeen syllables told.' A good seventeen - syllables short story should be concise and capture a vivid scene in just those few words. It's about choosing the right elements to convey a feeling or idea.
The number of syllables in a fictional name can vary greatly. It could be as few as one or as many as five or more. It often depends on the style and genre of the story, as well as the desired effect on the reader.