Jennifer
Holding the book open he glanced down and then back at her, the book was full almost exclusively with imagines of plants and herbs. To claim those strange was quite the conundrum, but he could at least show a speck of patience,

"Plants? Are weird when drawn? How curious, but I am Senju Tatsurama. Commander in the Frontier Patrol."

He clasped the book closed before he opened his mouth. From within it he reached in to produce what I'm modern times took the appearance of a retainer. What was different about this were the five gel capsules held at the corners of a pentagon like formation,

"This is a mild poison I have manufactured, I call it Warrior's Decline. It effects what I consider to be the most valuable aspects of a taijutsu specialist, that being their speed and reflexes. If they can't react and they can't run away, they are certain to get hit. Unfortunately at my level, their endurance is a bit too strong. So, I'll need to manufacture an even stronger one. I think I'll call it Warrior's Demise."
Judith
Ko wasn't the biggest fan of books, and hearing the Commander begin to nerd out about the poison slightly worried her. She barely knew anything about the topic, and him bringing up his targets being mainly Taijutsu Specialists interested her. Did he mean that they were the main victims of these poisons...? 

"That's... Pretty cool. If you need help coming up with some poison, I guess I could help. I'm pretty good with Taijutsu myself!" 

Ko exclaimed proudly, putting her hands on her hips confidently. He was a member of the Frontier Patrol, he definitely would not severely harm a Genin. And, this would be amazing practice for her. Practicing with an **Actual** High rank Chunin, instead of being taught gently by one.
Jennifer
"I am certain of what poisons I wish to create, the advanced poison will be called Warrior's Demise. After that is world of darkness, it will cause absolute blindness and near deafness. After that will be a progressive poison for complete organ failure to sabotage enemy camps. I can show you how the first one will work."

He passed the retainer back into his mouth, after which he ran through a quick series of hand seals before pointing his face away from them. Right after a massive purple cloud would spray out, blanketing much of the field. (Poison Mist B++).

"That would bring down your speed and reflexes to nearly nothing."