edit_summary: copyedit
diff.text: His name, just like the girls', carries a pun. His surname ''Chiba'' means ''local'' and contains the kanji &#22320; - ''chi'' which also appears in the word ''chikyuu'' meaning ''Earth'' and &#22580; - ''ba'' meaning ''place'' or ''location''. His given name ''Mamoru'' &#34907; means ''to protect''. So the pun in his name is '''loosely''' ''Earth Protector'' or ''Local Protector''.