The second character is one of the little women (4)
I believe the answer is:
beth
'one of the little women' is the definition.
(I've seen this in another clue)
'the second character' is the wordplay.
'the second' becomes 'b' (B can mean second eg B-side).
'character' becomes 'eth' (I've seen this before).
'b'+'eth'='BETH'
'is' is the link.
(Other definitions for beth that I've seen before include "Hebrew B" , "Concluding stanza" , "Hebrew letter; a Little Woman" , "Queen, either of two" , "letter to the Hebrews" .)