Mr Mandela is often referred to as âKhuluâ, which means great, paramount, grand. The speaker means âGreat Oneâ when referring to Mr Mandela in this way. It is also a shortened form of the isiXhosa word âTat'omkhuluâ for âgrandfatherâ.
I assume 'Pico' is a name. Boku refers to oneself (like 'watashi', 'ore', 'washi', etc.) like 'I' and 'no' indicates possession (for example, 'boku no inu' would be 'my dog' or 'dog of mine' (in reverse order since dog appears at the end in the Japanese sentence) since 'inu' is dog in Japanese).
BokusenÅ (æ´ä»ç¿, Old Tree Hermit) was a wise tree yÅkai and ally of the Inu no TaishÅ who would use the wood from BokusenÅ's own boughs to craft the scabbards for two powerful swords, the Tessaiga and the Tenseiga.