First person to answer this riddle gets a prop.....

First think of the person who lives in disguise who deals in secrets and tells naught but lies. siguiente tell me what's always the last thing to mend, the middle of middle and end of end? And finally, give me the sound often heard during the buscar for a hard to find word. Now string them together and answer me this: Which creature would tu be unwilling to kiss?

It's quite tricky so Good Luck all....